八年级下生物期末4（In the eighth grade, the creature will end up at 4）.doc

八年级下生物期末4（In the eighth grade, the creature will end up at 4） Eighth grade biology book final test volume I can choose between A, B, C and D, but only one of them is the most correct one. 1 under the condition of without any increase in arable land area, greatly improving the output of crops, is undoubtedly the best way to solve the problem of food, and which of the following scientists have made outstanding contributions in this aspect, is known as the father of hybrid rice is (). [C]. [B]. [C]. [D] 2 jungle fowl were the ancestors of modern chicken, only 8 ~ 12 jungle fowl eggs every year, and now many kinds of layer chicken can spawn A year 200 ~ 300, this kind of phenomenon is the cause of a. b. the result of natural selection result of artificial selection c. d. living environment on which the food different results The general procedure for scientific inquiry is () A. ask questions, make assumptions, make plans, implement plans, draw conclusions, communicate, and communicate B. make assumptions, ask questions, draw conclusions, make plans, implement plans, express and communicate C. make plans, implement plans, raise questions, make assumptions, draw conclusions, express and communicate D. ask questions, draw conclusions, make assumptions, make plans, implement plans, express and communicate The difference between infectious and non-communicable diseases is that infectious diseases have () Infectivity is contagious A, B, C, and B 5. People in the mountain built a reservoir for water storage, cut down the trees on the hill, with selling the proceeds to invest, but when after reservoir built into the mountains without water, this is because the trees can keep water and soil, piece of moss plants also have important role to soil and water conservation, this is because the bryophytes () A. The gaps in the plant can store A large amount of water. The organization can store A lot of water C. the root system is developed and can absorb a lot of moisture. The environm