19.
It is pointed out in the passage that life is the outcome of
.
A) the interaction between plants and animals
B) change from a physical to a chemical state of being
C) physical change taking place in the animal world
D) the constant change, both physical and chemical, occurring in protoplasm
E) the activities a person fulfills
20.
It is understood from the passage that the science of botany ,
A) is less specialized than that of zoology
B) deals with a limited number of plants
C) is concerned with the plant world
D) is a subsection of zoology
E) is not so well-known a zoology
21.
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