The first part of 29 questions (40 points)
1. In the composition of plasma membrane, cholesterol molecules (65,438+0 points)
A. only exists in higher animal cells. Instruments exist in higher plant cells.
C. it exists in the cells of higher animals and plants. It hasn't been determined yet.
2. The sodium and potassium pump on the plasma membrane will consume every 1 ATP molecule (1 point).
A. transfer 2 potassium ions into cells and 2 sodium ions out of cells.
B. transfer 2 Na+ into the cell and 2 K+ out of the cell.
C, transferring three K+ ions into the cell and two Na+ ions out of the cell.
D. transfer 2 K+ into the cell and 3 Na+ out of the cell.
3. Where are the enzymes that make up lysosomes finally synthesized (1)?
A. on the ribosome of rough endoplasmic reticulum.
C. act on free and rough endoplasmic reticulum ribosomes at the same time. D. act on these two ribosomes alternately.
4. Which of the following molecules cannot pass through the protein-free lipid bilayer (1)?
A. carbon dioxide ethanol urea glucose
5. Which of the following histones is not the core protein of nucleosome (1)?
A.H2B H3 H4
6. Which of the following organelles has a proton pump (2 points)
A. endoplasmic reticulum b golgi c lysosome d mitochondria e chloroplast
7. Which of the following conditions are needed for ATP synthesis in mitochondria (2 points)
A. the matrix contains O2 B and ADP.
C. the concentration of H+ in the matrix is greater than the membrane gap d. The concentration of H+ in the matrix is less than the membrane gap.
8. Which of the following phenomena will occur during cell meiosis (2 points)
A. homologous chromosome pairing B. DNA replication C. homologous chromosome exchange D. gene mutation
9. Under the electron microscope, the plasma membrane presents a "dark, bright and dark" structure. What is the main reason? (2 points)
A. The hydrophilic head of phospholipid molecules is easy to be dyed B. The existence of outer membrane protein
C. the existence of extracellular matrix and subcellular skeleton D. the existence of transmembrane protein
10. Which of the following statements about histone is correct: (3 points)
A. Histones are ubiquitous in eukaryotic cells; B. Histone is very conservative among species, and its evolution is slow;
C. histone is rich in histidine; D. Histone is alkaline; E. Histone modification will affect gene expression.
1 1. Which of the following is the main end product of purine nucleotide catabolism in human body? ( 1)
A. urea; B. uric acid; C. alanine; D. creatine; E. creatinine
12. What is the main difference between α-D-glucose and β-D- glucose? ( 1)
A. hydroxyl groups on carbon atoms
C. hydroxyl group on the fifth carbon atom D. hydroxyl group on the fourth carbon atom
13. According to the classification of fatty acids, which fatty acid should oleic acid belong to? ( 1)
A. soft fatty acids B. arachidonic acid C. hard fatty acids D. unsaturated fatty acids
14. Which of the following amino acids is aromatic in the classification of amino acids? ( 1)
Alanine b serine c tryptophan d leucine
15. protein's peptide bond is formed in which of the following ways? ( 1)
A, A- amino group is condensed with A- carboxyl group, and B, A- amino group is condensed with β-carboxyl group.
C.β- condensation of β -amino group with α -carboxyl group. D. β -amino group and β -carboxyl group are condensed.
16. Which of the following is the main difference between DNA and RNA? ( 1)
A, (ester bond), b, (ribose). C, (base), D, (phosphate group).
17. Which of the following characteristics does an isozyme have? ( 1)
A. has the same protein molecular structure; B. has the same physical and chemical properties.
C. catalyze the same chemical reaction D. have the same immune performance.
18. The most important operation step before using centrifuge to centrifuge 100ml sample is balancing. Which of the following operations is correct? ( 1)
A. Appearance inspection
B. Measure the sample solution with the same volume with a measuring cylinder and pour it into two centrifugal tubes respectively.
C. Balance the two centrifuge tubes with a tray balance, and then pour the sample solution into the centrifuge tubes respectively.
D. Pour the sample solution into two centrifugal tubes respectively, and then balance with a tray balance.
19. Which of the following descriptions about enzymes is incorrect? (2 points)
A. The chemical essence of most enzymes is protein B, and all enzymes must combine with auxiliary groups or coenzymes to play a catalytic role;
C. all have stereoisomeric specificity. D. it can significantly change the chemical reaction rate.
20. In the process of separation and purification of biological macromolecules, a method for separating biological macromolecules from inorganic salts and organic micromolecules.
Which of the following is it? (3 points)
A. ion exchange chromatography B. gel filtration chromatography C. filter paper filtration D. dialysis E. centrifugation
2 1. Plant microbial diseases will cause plant functional failure and metabolic disorder, leading to the decline of plant viability and even death.
Death or a substantial reduction in production. Which bacteria is less pathogenic to plants? ( 1)
A. bacteria B. actinomycetes C. mold D. plant virus
22. Pasteur used flask test to verify which of the following theories? ( 1)
A. Refuting the theory of spontaneous occurrence B. Proving that microorganisms are pathogenic
C. Understanding the chemical structure of microorganisms D. Proposing the spontaneous generation theory.
23. Ordinary optical microscope uses oil mirror to observe, where should the mirror oil be added? ( 1)
A. on the sample B. on the objective C. between the sample and the objective D. on the eyepiece.
24. When should the inoculation ring be cauterized and sterilized? ( 1)
A. Before use B. After use C. Before use and after use D. Before storage
25. The sterilization principle of autoclave is which of the following? ( 1)
High pressure, high temperature and high humidity.
26. What kind of utensils are generally used for microbial solid culture? ( 1)
A. triangle bottle B. test tube C. reagent bottle D. Petri dish
27. What is the role of agar in the culture medium during microbial solid culture? ( 1)
A. coagulants 8. Nutrients C. Growth regulators D. Inorganic salts
28. Which of the following strains can be used to produce yogurt? (2 points)
A. Bacillus subtilis B. Streptococcus thermophilus C. Lactobacillus bulgaricus D. streptomyces griseus
29. What are the greenhouse gases produced by microorganisms? (2 points)
A.H2 methane D. N20
The second part is 4 1 (48 points)
30. The first structure formed after meiosis of pteridophytes is (1).
A. spores; B. sperm; Sporophyte; gametophyte
31.In 2009, China issued two safety certificates for the production and application of genetically modified rice varieties with independent intellectual property rights.
What are these two genetically modified rice? ( 1)
A. transgenic rice with insect-resistant gene B. transgenic rice with phytase gene
C. transgenic rice with glutamate synthase gene
32. The liverworts are usually used for the study of liverworts. It is known that the sex of their plants is determined by sex chromosomes, and
And belongs to XY type, then the sex chromosome of male plants is (1).
A.XX B . XY c . X D . Y . e . YY
33. Catheters and tracheids are cells that perform transport functions in xylem. What are their main differences? ( 1)
A. whether it is a dead cell; B. secondary wall thickening method; C. presence or absence of perforated plates; Length-width ratio of D cells
34. The commonly used reagents for extracting plant chlorophyll are: (1)
A. ethanol b glycerol c distilled water d acetone
35. In plant tissue culture, induction is carried out when the ratio of cytokinin to auxin is low (1).
A. differentiation of buds B. differentiation of roots C. differentiation of leaves D. dormancy of buds
36. The plant hormone that causes stomatal closure of plant leaf epidermis is (1).
A.CTK Federal Institute of Technology
37. The use of dark period will inhibit the flowering of short-day plants. Which of the following lights is the most effective (1)?
A. red light B. far red light C. blue violet light D. green light E. white light
38. The vascular bundle of rice stem belongs to (1).
A. Double tough vascular bundle B. Peripheral bundle C. External tough open bundle D. External tough limited vascular bundle
39 which of the following belong to homologous organs (2 points)
A. thorns on the stems of roses and cactus B. thorns on hawthorn trees and potatoes (potatoes)
C. potato (potato) and sweet potato (sweet potato) D. haustorium of sweet potato (sweet potato) and dodder
40. The female gametophyte of angiosperms refers to (1).
A. Pistil B. Ovule C. eight nuclear embryo sac D. Ovary
4 1. Which of the following statements is correct (2 points)
A. gymnosperms have archegonia B. Double fertilization is a unique phenomenon of seed plants;
C. The mature pollen grains of angiosperms have a vegetative cell and a sperm cell;
D. The calyx, petals, stamens and pistils of angiosperms are homologous organs.
42. In the life history of angiosperms, the first cell in the gametophyte stage is (1).
A. zygote b gamete c spore d seed
43. The endosperm of gymnosperms is (1).
A. Sperm eggs developed from nucellar cells after fertilization. B. Sperm eggs developed from female gametophyte cells after fertilization
C. after fertilization, sperm eggs develop from fertilized polar nuclei. After fertilization, sperm eggs develop from ventral sulcus cells of the archegonium.
44. In the process of restoring woodcarving cultural relics, it is often necessary to separate pieces of cultural relics and observe them under a microscope to judge the cultural relics.
What plant material is it made of? If you observe which of the following types of cells, you can judge that it can't be made by cypress:
( 1)
A. sieve cells; B. catheter molecules; C. fiber; tracheid
45. The gardener wanted to collect seeds from a newly transplanted pine tree, and he found that the pine tree appeared female in April 2009.
Cones, when can gardeners collect mature seeds from these female cones? ( 1)
A. September A.2009; 8. June 2009: 5438+065438+ 10; C.20 10 1 month; D. 20 10 September
46. The sexual spore produced by yeast is (1).
A. spores, oospores, conidia, ascospores
47. Asparagus is a delicious vegetable. Some scattered cell clusters can be seen through the section of asparagus. these
What is a cell cluster? Judging whether asparagus is monocotyledonous or dicotyledonous according to this characteristic. ( 1)
A. stone cell dicotyledonous plants B. vascular bundle monocotyledonous plants
C. fiber bundle dicotyledons D. stone cell monocotyledons
48. When observing the cross section of the stem primary structure of dicotyledonous plants, which of the following phenomena can be observed if it is dyed with iodine solution: (1)
A. There is a circle of cells dyed dark blue outside the vascular bundle, which is equivalent to the endodermis;
B. There is a circle of cells dyed dark blue outside the vascular bundle, which is equivalent to the stele sheath;
C. There is a circle of cells dyed dark blue under the epidermis, which is equivalent to the outer cortex;
D. There is a circle of cells dyed dark blue under the epidermis, which is equivalent to thick horn tissue cells.
49. From the point of view of reproduction, the flowers of angiosperms and spores of ferns are similar as follows: (1)
A. all can have sexual reproduction and produce spores; B. all can reproduce sexually to produce gametes;
C. all can reproduce asexually to produce gametes; Both can reproduce asexually to produce spores.
50. The common methods for detecting seed vigor are triphenyltetrazolium chloride method (TTC method) and red ink staining method. Which of the following statements is true about this experiment? (2 points)
A. In TTC method, every embryo dyed red is a dynamic seed;
B. In the red ink dyeing method, the viable seeds are those whose embryos are not colored or lightly colored;
C. The two methods are similar in principle, both of which use the selective permeability of living plasma membrane;
D. The two methods have different principles, and the principles of respiration and changes of plasma membrane permeability are applied respectively.
5 1. Cell division during the development of the following plants belongs to unequal division: (2 points)
A. the first division of megaspore; B. the first division of stomatal organ primitive cells;
C. the first division of microspore; The first division of fertilized eggs in angiosperms;
52. The appendages of arthropods have single and double branches, and many structures of arthropods are developed from appendages. In the following structures, the remains developed from or belonging to appendages are: (2 points)
A. antenna of locust 8. Frontal sword of prawns C. Spinning process of spiders D. Oviposition petals of locusts
53. pectoralis major and pectoralis minor are the driving forces for birds to lift and put down their wings. The following description is correct about the anchor points on both sides of pectoralis major and pectoralis minor: (1 min)
Like pectoralis minor, pectoralis major is connected with sternum and humerus at both ends.
Like pectoralis minor, both ends of pectoralis major are attached to sternum and coracoid respectively.
C both ends of pectoralis major are attached to the sternum keel and humerus respectively, and both ends of pectoralis minor are attached to the sternum keel and coracoid respectively.
D both ends of pectoralis major muscle are attached to sternal keel and coracoid respectively, and both ends of pectoralis minor muscle are attached to sternal keel and humerus respectively.
54. Most animals with open circulation have blood sinuses or blood cavities. Among the following animals, those without blood sinus or blood cavity are: (1)
A. scallop B. mantis C. amphioxus D. hydra
55. Dragonfly larvae live in water and have temporary respiratory organs, which are called: (1 min)
A. larva B. larva C. nymph D. first instar larva
56-59. Earthworm is the most common earthworm in southern China, and it is one of the representative animals of annelids. Because of its large size, it is a good material for anatomical experiments. The picture below shows a part of the earthworm after dissection. Look carefully at the picture on the right, then answer the following questions.
56. The picture shows what the earthworm was observed after it was cut (1 min).
A.8 near the belly line. Left side of the body C. Near the midline of the back D. Right side of the body
57. In the above figure, l, 2, 3 and 4 are respectively (1).
A. Abdominal blood vessels, hindgut, seminal vesicle and seminal vesicle B. Back blood vessels, gizzard, prostate and seminal vesicle
C. abdominal nerve cord, gizzard, seminal vesicle and seminal vesicle D. dorsal nerve cord, crop, prostate and seminal vesicle
58. From the viscera shown in the figure, it can be judged that the individual is (1).
A. female B. male C. both men and women have D. can't tell the gender.
59. If you want to observe the typical posterior renal duct structure, which area in the above picture is the best (1).
Both a.ib.i and iv c.iii d. will will will do.
60-63. The picture below shows the heart of a vertebrate. Please observe carefully.
60. It is judged that this animal belongs to (1 min) a class 8 bony fish of cartilaginous fish.
Amphibians and reptiles 6 1. A, B, C and D marked in the figure respectively represent (1).
A. left atrium, venous sinus, conus arteriosus and left ventricle
B. Right atrium, venous sinus, conus arteriosus and right ventricle
C. left atrium, conus arteriosus, venous sinus and ventricle
D. Right atrium, conus arteriosus, venous sinus and ventricle
62. If D and B are tied together with a thread, and then yellow coarse pigment is injected into B, which of the following structures will appear yellow (2 points)?
A. renal portal vein B. pulmonary cutaneous artery C. subclavian vein D. external carotid artery
63. If D and B are tied together with a thread, and then red coarse-grained pigment is injected into D, which of the following structures will appear red (2 points)?
A. renal portal vein B. pulmonary cutaneous artery C. subclavian vein D. external jugular vein
64. In paleontological research, bone fossils are the most discovered and studied part. Please judge which creature with this kind of skeleton is most similar to the existing one according to the following description of the skeleton (1 min).
1) The spine is divided into cervical vertebrae, thoracic vertebrae, lumbar vertebrae, sacral vertebrae and coccygeal vertebrae. 2) The chest is surrounded by thoracic vertebrae, ribs and sternum.
3) There are two temporal fossa on both sides of the skull; 4) There are a wide range of dental implants in the mouth.
A. amphibians, reptiles, birds and mammals
65. The pattern of animal sexual reproduction is (1).
A. conjugate reproduction of ciliates B. parthenogenesis of rotifers C. reproduction of leeches D. reproduction of gall midge larvae
66. In vertebrates, one kind of kidney is small and tubular and divided into several parts. One end of each renal tubule is open in the body cavity, and the opening is funnel-shaped with cilia, and there are blood vessels near the renal orifice. Metabolic waste in the blood is discharged into the body cavity through filtration, and the metabolic waste in the body cavity is collected into the renal tubule through the oscillation of cilia at the renal orifice. And the other end is merged into the main pipeline. Description of the above contents (1 min)
A. Primary kidney B. Anterior kidney C. Middle kidney D. Posterior kidney
67. Generally, these hormones can't cross the cell membrane and enter the target cell, but can only bind to the cell surface receptor (glycoprotein), which makes the body change rapidly and has complex functions. After hormone binding, cAMP is produced in cells, which stimulates or inhibits specific enzymes in target cells, changes specific metabolic activities of target cells, and then causes various physiological effects. Which of the following hormones does not belong to this category (1)
A. insulin 8 Glucocorticoid c growth hormone d epinephrine
Which of the following is the direct cause of diabetes? ( 1)
Insufficient insulin content in the blood. B the blood insulin content is too high.
C. the content of glucagon in blood is insufficient. D. the adrenaline content in the blood is too high.
Teeth can reflect the characteristics of mammals' feeding habits, feeding behaviors, lifestyles, body shapes and metabolic levels. according to
Judging the species and feeding habits of animals according to the following tooth characteristics (1 min)
1) has experienced two stages of deciduous teeth and permanent teeth in his life;
2) Permanent tooth type: 3.1.4.2/3.1.4.3;
3) All of them are short crown teeth;
4) The crowns of the first 1 and second maxillary incisors are three peaks, and the other incisors are two peaks.
5) canine teeth are curved ||{ 1 conical and sharp;
6) The premolar has three peaks and the molar has multiple peaks;
7) The maxillary fourth premolar and mandibular first molar are the largest, and the cusp of these two largest teeth is completely closed.
A. Primates, omnivores B. Primates, herbivores C. Carnivores, carnivores
D. cetaceans, carnivores, rodents, omnivores
Judging the species and feeding habits of animals according to the following tooth characteristics (1 min)
1) has experienced two stages of deciduous teeth and permanent teeth in his life;
2) Permanent tooth type: 3.1.4.2/3.1.4.3;
3) All of them are short crown teeth;
4) The crowns of the first 1 and second maxillary incisors are three peaks, and the other incisors are two peaks.
5) canine teeth are curved into a cone shape with sharp tips;
6) The premolar has three peaks and the molar has multiple peaks;
7) The maxillary fourth premolar and mandibular first molar are the largest, and the sharp points of these two largest teeth are completely tightly occluded.
A. Primates, omnivores B. Primates, herbivores C. Carnivores, carnivores
D. cetaceans, carnivores, rodents, omnivores
70. A person's blood type is judged by the fact that the red blood cells of people with type B blood do not agglutinate, but their red blood cells agglutinate with the serum of people with type B blood (1).
a . a . B . B . C . AB . d . 0
The third part of 20 questions (32 points)
Paecilomyces caudatus 70-72 is a commonly used biological experimental material. Now, 100 paramecium is transferred into l50ml rice straw culture solution for routine culture, and it is observed and counted regularly every day. The following figure shows the daily number of paramecium recorded in this experiment.
7 1. Which of the following statements is correct (2 points)
A. On the 4th to 7th day after the start of the experiment,
More dichotomous reproduction was observed.
B. On the 4th to 7th day after the start of the experiment,
More zygotic reproduction was observed.
After the 9th day after the start of the experiment, more dichotomous reproduction was observed.
After the 9th day after the start of the experiment, more zygotes were observed.
72. Which of the following statements is correct (2 points)
A. At the beginning of the experiment, count the density of paramecium, which must be O.67/ml.
B. the growth of paramecium in this experiment accords with logistic growth.
C In this experiment, the medium can accommodate about 800 paramecium at most.
D. paramecium can't grow indefinitely because of lack of space.
73. Material cycle in the ecosystem, also known as geochemical cycle, includes the following basic types (2 points)
A. gas circulation 8. Ocean cycle C. Sedimentary cycle D. Continental cycle
74. The following description of secondary production is incorrect (1).
A. Reproduction of organic matter by using the existing organic matter in the ecosystem belongs to secondary production.
B. The food source of secondary production is primary production.
In all ecosystems, the second production is far less than the first production.
D. The producers of secondary production are all from heterotrophs.
75. Generally speaking, what is the difference between the climax community after succession and the community in succession (2 points)?
A. The species diversity of polar community is high, and the species diversity of succession community is low.
B. Inorganic matter circulation is closed in climax community, but open in succession community.
C. The relationship between * * * in the climax community is developed, but the relationship between * * * in the successor community is underdeveloped.
D. The producers of secondary production are all from heterotrophs.
76. What kind of community has such characteristics? ① Less rainfall and more water evaporation? ② The dominant plants are Artemisia.
Animals, Chenopodium shrubs and succulent xerophytes ③ Animals usually hibernate or sleep in summer to spend the unfavorable season (1 min).
A. coniferous forests in the cold zone. Savanna C. tundra D. desert
77. Which of the following methods is not applicable to the investigation of the number of butterflies in the wild (2 points)
A. mark recapture method 8. Light trapping method C. quadrat survey method D. infrared trigger camera photography method
78. The age structure map of animal population is narrow at the bottom and wide at the top. Which of the following characteristics is wrong (1
Integral)
A.this is a declining population. B. The proportion of larvae is large, while the proportion of elderly individuals is small.
C. the population mortality rate is relatively high. D. The birth rate is relatively low.
79. The new tropical world includes all of South America, Central America and the West Indies. Which of the following animals is there in this world (2 points)?
A. Insectivores 8. New kangaroo suborder of marsupials D. broad-nosed suborder of primates
80. In order to verify the competitive relationship between red clover and chicory, the experimenters did the following experiments:
1) The two plants are planted in the same flowerpot, but the branches and leaves on the ground are separated, and the dry weight of chicory grows independently.
65 percent of the time;
2) The two plants are planted in different flowerpots, but the branches and leaves on the ground are very close, and the dry weight of Lycopodium japonicum is 47% of that when it grows alone;
3) The two plants are planted in the same flowerpot, and the branches and leaves on the ground are also close together. The dry weight of chicory is 365,438+0% of that when growing alone. Which of the following conclusions can be drawn from these experimental results (2 points)
A. When these two plants grow together, they will compete for important resources such as sunlight, nutrients and water.
The competition for sunlight and the competition for nutrients and water are interactive.
C. Compared with the negative effects of nutrient and water competition, the competition of sunlight has a greater impact on plant growth.
D. The influence of water competition on plant growth is greater than the negative effect of nutrient competition.
8 1. Which of the following statements is wrong about the energy flow in the ecosystem (2 points)
The energy flow in the ecosystem is unidirectional and irreversible.
B the energy will drop sharply during the flow, mainly because each trophic level will store a lot of energy.
C. The main source of energy flow in the ecosystem is solar energy.
If the energy input of an ecosystem is cut off, the ecosystem will be extinct immediately.
82. The survival chart takes the relative age as the abscissa and the corresponding survival number as the ordinate. The only correct statement about the survival curve below is (2 points)
A. The straight survival curve shows that the older the individual, the higher the mortality rate.
B. convex survival curve, which means that the mortality rate of all age groups is equal.
C) Concave survival curve, indicating that the mortality rate of larvae is high.
D. the survival curve of animal populations in nature is one of the above three.
83. Spider is a social spider. Individual food on the edge of the group
The capture rate is higher, but the risk of being preyed is equivalent to three times that of the central position of the group. According to the above information, please judge.
Which one is correct about the distribution position (1 min) of different individuals in the population?
A. The smaller young spiders are distributed in the center of the population. B. mature spiders with smaller individuals are distributed at the edge of the population.
C. Young spiders with larger individuals are distributed in the population center D. Mature spiders with larger individuals are distributed in the population center.
84. The sculpture Eriocheir sinensis lives in the central cavity of marine sponge. Females have the same appearance, while males have three forms: large, medium and small. These three different forms of males will adopt different reproductive strategies: males tend to defend multiple females in the central cavity of sponge by fighting; The male will imitate the female and live in the same room with the male;
Xiao Xiong worms avoid males and lie around them, waiting for the chance to mate with females. Studies have shown that the somatotype differences among Xiao Xiong worm, Nereis and Nereis mainly come from three alleles of a gene. The following inference is correct (1 min)
A. the average reproductive rate of males is the highest. 8. The average reproductive rate of intermediate males is the highest.
C. The average reproduction rate of Xiao Xiong worm is the highest. D. there is no significant difference in the average reproductive rate of the three males.
85. Nucifraga CoJumbiana, Gymnorbinus cyanocephalus and blue jay are related species of the same family. Starcrow lives at high altitude, and its food in winter and spring is almost all seeds stored in autumn. They store about 33,000 seeds every year. Jaws are distributed in low-altitude areas and live in groups all the year round. Each Jay stores 20,000 seeds every year, which constitutes 70-90% of its winter food. Blue Jay lives at low altitude and is the smallest. Each Jay stores 6000 seeds every year, accounting for 60% of the winter food. If the three birds are placed in the same small experimental area, and they are allowed to store and dig seeds respectively, the order of their memory ability is (1).
A.star crow >； Jay > Blue Jay B. Blue Jay > Jay > Star Jay
C. Jay > Star Jay > blue jay D. 3 species are the same.
86. The newborn grey goose regards researcher Lorenz as her mother and follows them all the time. What kind of behavior (2 points)?
A. imprinting behavior 8. Stereotyped behavior C. Protective behavior D. Learning behavior
87. Domestic swallows, European swallows and sand swallows migrate between the west of Gubei and Africa every year. R.E.Moreau estimates that about 90 million domestic swallows, 220 million European swallows and 375 million sand swallows fly to Africa every autumn. The number of these three species of birds is more than the total number of 3 1 species of non-migratory swallows on the African continent. Which of the following statements is correct (2 points)
A. The ancestors of these three migratory swallows once bred on the African continent.
B: In the west of Palaearctic realm, these three swallows met less food competitors.
C. The summer days in the west of Palaearctic realm are longer, which can increase the time of catching insects and is beneficial to their reproduction.
D. Long-distance migration can enhance physical fitness and improve the success rate of reproduction.
Some species of female fireflies in 88.88 genera. Fireflies are carnivores. They will respond to their males by simulating the luminous frequency of females belonging to the other three fireflies, induce males of different species to approach, and then capture, kill and eat them. Which of the following strategies is feasible for males of three fireflies (1)?
A. completely ignore the mother's reaction. B. Find the female insect that reacts and fly directly to mate.
C. changing the luminous frequency to attract females; D, slowly approach after finding the female who reacts.
89. Sea slugs have bright red papillae. When disturbed, these papillae will keep swinging and fish will attack them. Mastoid can be regenerated after being bitten off, and it contains toxic substances. What is the correct explanation for this behavior (2 points)
A. secondary defense B. shifting the attacker's offensive position C. warning color D. primary defense
90. During estrus, the males of the red-crowned pygmy bird will gather in a relatively small area to attract females with specific steps and flapping behaviors. From the above characteristics, it can be concluded that the monogamy of this species belongs to which of the following types (1 min).
A. defending wives and concubines 8. Defend resources C. Fight for competition D. Courtship field