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ANIMALS AND PLANTS
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 chemicalsto 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.
Animal cells lack the cell wallsthatcharacterizeplant 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 havetwo 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.
Animallife began in the Precambrian seas with theevolution of multi-cellular forms that lived by eating other organisms. This new way of life ted to an evolutionary explosion of diverse forms. Early animals populated the seas, fresh 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.
Q: 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.
Plants
F |
H |
I |
Animals
A |
B |
D |
E |
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