A. paddling and swimming B. balancing your body C. crawling underwater D. controlling your direction.
When the fish moves in the water, the gill cover keeps opening and closing, which is why the fish.
A. swallow food B. swallow water C. breathe D. dissipate heat
3. The following are not coelenterates.
A. complicated structure B. living in water C. having a digestive cavity D. having a mouth and no anus.
4. It is very common to see some earthworms on the ground after the rain. This is because
A. Earthworms climb out of the ground to breathe B. Earthworms climb out of the ground to drink water.
C. Earthworms like to crawl on wet ground D. With the help of wet ground, earthworms can quickly change their living environment.
5. In the digestive system of rabbits, the characteristics suitable for phytophagy are as follows.
A. canine teeth and cecum are developed. B. canine teeth are underdeveloped and cecum is developed
C. Molar teeth and cecum are developed D. Molar teeth and cecum are developed
6. Which of the following is not the characteristic of domestic pigeons to adapt to flying life?
A. long bones are hollow B. there are feathers on the body surface C. fertilization in vivo D. the body is streamlined.
7. The function of grasshopper exoskeleton in grasshopper land life is
A. Resist the enemy's harm B. Assist in exercise C. Help predation D. Prevent evaporation of water in the body
8. When designing the control experiment, we should pay attention to the following questions.
A. all variables are the same. B. All variables are different.
C. Except for the experimental variables, other conditions are different. D. Other conditions are the same except experimental variables.
9, the following can complete elbow flexion action is
A. The biceps brachii relaxes and the triceps brachii contracts.
C. biceps brachii contraction, triceps brachii contraction D. biceps brachii relaxation, triceps brachii relaxation
10, "smug" and "dragonfly water" belong to animals respectively.
A. aggressive behavior, defensive behavior B. reproductive behavior, reproductive behavior
C. defensive behavior, aggressive behavior D. defensive behavior, defensive behavior
1 1, ① The monkeys stung by bees no longer feed on honey; (2) Cardinals who lost their chicks were fed goldfish with their mouths open for food; ③ Hens hatch eggs; The mouse went through the maze to find food. Among them, the behavior of the first world is
A.①④ B. ②③ C. ②④ D. ①③
12, China ancient book "Grass and Trees Sparse" said that "grasshoppers are green, with long horns and long stocks, and stocks are also singing", indicating that animals transmit information.
A. Vision B. Smell C. Secretion D. Sound
13, The experiment of "Earthworms Walking Labyrinth" shows that earthworms have the following behaviors.
A. study B. defend C. attack D. escape
14, the following phenomena and allusions belong to innate behavior.
A. Looking at plums to quench thirst B. Old horses know the way C. A glass of bow and snake shadow D. Tears of smoking
15, which of the following measures is most beneficial to protect the ecological environment?
A. Reclaim a large area of marshland into farmland
B, spraying pesticides on vegetable fields to kill Pieris rapae.
C. using sex attractants in the field interferes with the communication between male and female pests.
D. Discharge industrial wastewater into the sea area where "red tide" occurs, and let toxic algae die.
16, the chameleon can change its body color with the change of environment. This behavior is very important to it.
A. it belongs to defensive behavior. It is beneficial to escape from the enemy's harm.
C. it is conducive to predation. The first three items are meaningful.
17, the role of animals in the ecosystem is
A. decomposers, consumers and producers.
18, in a food chain consisting of grass → voles → owls, if all owls are eliminated, the number of mice will decrease.
A. slow rise B. rapid rise C. relatively stable D. rapid rise first and then sharp decline.
19, the following are transgenic plants.
A. greenhouse watermelon B. seedless watermelon C. insect-resistant cotton D. space pepper
20, the following is not closely related to bionics
A. radar B. submarine C. fluorescent lamp D. breaststroke
2 1, bioreactor refers to
A. Animals B. Plants C. Genetically modified organisms D. All living things
At present, people think that the ideal bioreactor is the "breast bioreactor", that is, human beings can transform some animals (such as cattle and sheep) to make their breasts produce and secrete some substances we need.
A. Breast B. Genetic gene C. Nucleus D. Chromosome
23, in biological control, which of the following is not included?
A. pest control B. using natural drugs to control pests C. using birds to control pests D. using bacteria to control pests
24. Take two live locusts: A's head is immersed in the water, and B's chest and abdomen are all immersed in the water, only the head is exposed. Therefore,
A.a dies first, B dies first, C at the same time, D will not die.
25. A large number of Pieris rapae appeared in some places this summer. Cabbage butterflies belong to
A. mollusks B. birds C. insects D. none of the above
Two. Fill in the blanks: (65438+ 0 for each blank, *** 15)
26, 200310 On June 55438+05, China's self-developed "Shenzhou 5" spacecraft carried China's own astronaut Yang Liwei into space successfully, and spent 2 1 hour in space, realizing the space dream of several generations in China! Astronauts flying in space for a long time will lose weight, which will affect the transmission of blood to the lower limbs. If proper measures are not taken, the muscles of lower limbs will lack nutrition and even atrophy. Inspired by the research on animals, scientists designed special instruments so that the blood in astronauts can be transported to the lower muscles far from the heart in weightlessness.
Whether freshwater fish, such as, or marine fish, such as, all swim, breathe and live in the water for a lifetime.
28. The mammal known as the "boat of the desert" is.
Mammals are higher organisms, and there are about 4,000 species on the earth. All species except a few have the same characteristics.
30. Please write down two joints on your body: joint and joint.
3 1. Animals on the earth can be divided into invertebrates and vertebrates according to whether there is a spine in the body. If it is an invertebrate, it is a vertebrate.
32. Fill in the following ancient poem completely: "Death is coming, and every night the candle tears are exhausted."
33. The flying mammal is.
34, bones, joints and * * * isomorphism has become our human sports system.
Grasshoppers and moths are pests in rice fields. They are thinking about how to deal with the little frog together. The grasshopper said, "The frog jumps high and far. We should run away when we see it. " The moth said, "The frog has a good eye and can't run away when he sees it. It is better to find a way to hide. " Just then, I saw a little frog jump over. The grasshopper shouted "Run" and spread its wings to fly, but the moth could not move. Clever students, please guess which pest the frog caught first? .
Third, look at the picture and answer: (this question *** 12 points)
36. The picture on the right shows the respiratory system of pigeons. Please answer according to the chart:
(1) As can be seen from the figure, the airbag is directly connected with the airbag.
(2) When pigeons inhale, the direction of airflow is (fill in the code in the picture).
⑶ Physiologically, the expansion and contraction of air bags depend on domestic pigeons. (2 points)
(4) Airbags are distributed between walls, and some even protrude into the walls.
5] The breathing process of domestic pigeons:
(1) The wing is lifted, the airbag and the outside air enter.
② The wings droop, and the air in the airbag is discharged from the body.
③ The characteristics of pigeon breathing are as follows. (2 points)
4. Data analysis questions: (8 points for 37 questions, 8 points for 38 questions, *** 16 points)
37. The "Sangji Fish Pond" agricultural ecosystem has been established in parts of southern China, which has achieved a comprehensive harvest of fish, pigs, silkworms and grain. The diagram below shows the material circulation and energy flow of the ecosystem. According to the chart, the answer is:
(1) The energy required by the ecosystem comes from.
(2) The producers of this ecosystem are.
(3) In addition to the known biological species, there must be other organisms in this ecosystem.
(4) Ecosystem is established according to the principle of ecosystem.
5] In this ecosystem, the decisive component is.
[6] The fundamental reason for the comprehensive utilization of crop branches and leaves to improve agricultural efficiency lies in.
Once the functional groups existing in the biogas digester.
38. Read the following information to answer the questions:
In 1950s, many Jacques people in Borneo suffered from malaria. The World Health Organization has adopted a simple and direct solution: spraying DDT. Mosquitoes died and malaria was under control. But before long, a wide range of sequelae appeared. Because DDT also killed wasps, the natural enemy of caterpillars eating thatched roofs, people's houses collapsed one after another. At the same time, the insects poisoned by DDT later became the food of gecko, and the gecko was eaten by the cat. DDT invisibly established a food chain, which caused lethality to cats. The decrease in the number of cats led to a large number of mice. When typhus and forest plague broke out on a large scale, the World Health Organization had to airdrop14,000 live cats to Borneo, and the Royal Air Force carried out a strange task-"Cat Airdrop Operation".
(1) Mosquitoes belong to insects, and their bodies are composed of three parts.
(2) Geckos and mice belong to warm-blooded animals.
(3) Through the analysis of the above data, why do you think humans can't kill some animals at will? (2 points)
⑷ From the data, it can be seen that if there is a problem with mosquitoes as a link in the food chain or food web, it will affect the whole ecosystem, which shows the important role of animals in maintenance.
5. In 1960s, American biologist Rachel Carson published a report that shocked the whole country and wrote a book called "". She warned the president and citizens of the United States that the abuse of DDT and other chemicals has caused ecological and health disasters. Even the birds are poisoned, and the birds can't hear their songs, and spring becomes silent.
Verb (abbreviation of verb) experimental inquiry question: (7 points for this question)
39. Read the following experimental inquiry process:
1. A small locust fell off the line to tease a hungry toad, and the toad would immediately open its mouth and eat the small locust.
(2) Instead, use a stolen fly to lure toads. The shape and color of the fly look like a big wild bee, but there is no sting. Toads will swallow stolen flies like small locusts.
(3) Then the toad was teased by a big wild bee hanging from a rope. The toad still opened his mouth to swallow, but the big wild bee stung the toad's tongue and the toad spit it out at once.
(4) Use the big wild bee to tease the toad, and the toad will bow its head and ignore it.
⑤ Tease the toad with stolen flies, but the toad won't eat them.
Finally, the toad was lured by a small locust hanging from a string, and the toad swallowed the small locust again, which showed that the toad was not full.
Answer the question:
Experiment ① ② ③ shows that toad has the instinct of preying on insects.
(2) Experiment (4) shows that the toad has recognized the big wild bee through life experience, so it is no longer swallowed.
⑶ Experiment ⑤ shows that toad's ability to solve problems by experience is better than that of higher animals.
(4) Experiment (6) proved that Toad did establish a new one in Experiment (3, 4, 5).
The eighth grade biology examination paper reference answer
B
C
A
A
B
C
D
D
B
B
B
D
A
D
C
D
B
D
C
D
C
B
B
B
C
26.giraffe
27, crucian carp hairtail (other reasonable answers can also be above two empty) fin gill
28, camel
29, viviparous breastfeeding
30. Wrist and knee (other reasonable answers are also acceptable)
3 1, mussel fish (other reasonable answers are acceptable)
32. Spring silkworm
33, bats
34, skeletal muscle (or muscle)
35.locusts
Third,
36.( 1) Lung (2) 1243 (3) Wings flapping up and down (4) Internal organs.
⑸ ① dilate the lung and balloon ② contract the lung ③ Every breath, there are two gas exchanges in the lung.
Fourth,
(1) light (or sunlight) (2) crops (3) decomposers of bacteria and fungi (4) ecological balance
The resolver [6] has been reused many times.
Once decomposers (or bacteria and fungi)
38.( 1) Head, chest and abdomen (2) Rats (3) Slight (4) Ecological balance (5) Silent spring.
Five,
39. (1) Congenital behavior (2) Learning behavior (3) Low (4) Learning behavior.