多选题
1 We can distinguish animals from plants by looking at their contrasting modes of nutrition. Unlike plants, animals cannot manufacture their own food. Animals cannot construct organic molecules from inorganic chemicals as plants can during photosynthesis. Animals must take pre-formed organic molecules into their bodies. Most animals do this by ingestion--that is, by eating other organisms or organic material. Animals store their food reserves as glycogen, whereas plants store their food as starch.
2 Animal cells lack the cell walls that characterize plant cells, and animal cells have unique types of junctions between them. In most animals, cells are successively organized into tissues, organs, and organ systems. Animals have two types of tissues that plants do not have. The first is nervous tissue, for the conduction of electrical impulses, and the other is muscle tissue, for movement. Nerves and muscles, which control active behavior, are unique to animals.
3 Animal life began in the Precambrian seas with the evolution of multi-cellular forms that lived by eating other organisms. This new way of life led to an evolutionary explosion of diverse forms. Early animals populated the seas, flesh water, and eventually the land. The diversity of animal life on Earth today is the result of over half a billion years of evolution from those first ancestors that consumed other life forms.
3. Select the appropriate sentences from the answer choices and match them to the form of life that they describe. TWO of the answer choices will NOT be used. This question is worth 4 points.
A. They are not able to manufacture their own food.
B. They construct organic molecules from inorganic chemicals.
C. They have the ability to survive on another planet.
D. Nerves and muscles control their active behavior.
E. They evolved from multi-cellular forms that ate other organisms.
F. They store their food reserves as starch.
G. They have evolved very little over one billion years.
H. They have neither nervous tissue nor muscle tissue.
I. Their cells do not have walls.
ANIMALS AND PLANTS
1 We can distinguish animals from plants by looking at their contrasting modes of nutrition. Unlike plants, animals cannot manufacture their own food. Animals cannot construct organic molecules from inorganic chemicals as plants can during photosynthesis. Animals must take pre-formed organic molecules into their bodies. Most animals do this by ingestion--that is, by eating other organisms or organic material. Animals store their food reserves as glycogen, whereas plants store their food as starch.
2 Animal cells lack the cell walls that characterize plant cells, and animal cells have unique types of junctions between them. In most animals, cells are successively organized into tissues, organs, and organ systems. Animals have two types of tissues that plants do not have. The first is nervous tissue, for the conduction of electrical impulses, and the other is muscle tissue, for movement. Nerves and muscles, which control active behavior, are unique to animals.
3 Animal life began in the Precambrian seas with the evolution of multi-cellular forms that lived by eating other organisms. This new way of life led to an evolutionary explosion of diverse forms. Early animals populated the seas, flesh water, and eventually the land. The diversity of animal life on Earth today is the result of over half a billion years of evolution from those first ancestors that consumed other life forms.
3. Select the appropriate sentences from the answer choices and match them to the form of life that they describe. TWO of the answer choices will NOT be used. This question is worth 4 points.
Answer Choices
A. They are not able to manufacture their own food.
B. They construct organic molecules from inorganic chemicals.
C. They have the ability to survive on another planet.
D. Nerves and muscles control their active behavior.
E. They evolved from multi-cellular forms that ate other organisms.
F. They store their food reserves as starch.
G. They have evolved very little over one billion years.
H. They have neither nervous tissue nor muscle tissue.
I. Their cells do not have walls.
【正确答案】
B、F、H
【答案解析】Plants: ... construct organic molecules from inorganic chemicals as plants can during photosynthesis; ...plants store their food as starch; ... two types of tissues that plants do not have. The first is nervous tissue...and the other is muscle tissue.
A, D, E, I Animals: ...animals cannot manufacture their own food," Nerves and muscles, which control active behavior, are unique to animals; Animal life began.., with the evolution of multi-cellular forms that lived by eating other organisms; Animal cells lack the cell walls Answer (C) is not mentioned; answer (G) is inaccurate.