Some protists live in "houses" constructed exclusively of organic molecules. These "houses" are called:

A. calcium carbonate skeletons.
B. silica skeletons.
C. cell walls.
D. tests.
E. None of the answers options is correct.


D

Biology & Microbiology

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Which of the following is not part of the shoot system of plants?

a. the stem b. the flower c. fruit d. taproot e. branches

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In the processes of endocytosis and exocytosis, a molecule is moved across the plasma membrane by a protein, which changes shape or orientation.

a. true b. false

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A) eviscerion B) viroid C) provirous D) bacteriophage E) virunette

Biology & Microbiology