One of the three main functions of stems is to a
carry out photosynthesis.
b
store carbohydrates.
c
store water.
d
carry water and nutrients between roots and leaves.

Hurry which of these is true about index fossils? a) are very scarcely found b) used as guides in relative dating c) found in the youngest layer of the rock d) used as reference points in absolute dating

Compare the composition of the moon's surface with the composition of the earth's surface.

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