Which of the following can waterproof cell walls, allowing for structures such as watertight conduction channels?

a. lignin
b. hemicelluloses
c. pectin
d. cellulose
e. chitin


A

Biology & Microbiology

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Compared with sponges, cnidarians have a wider array of cell types permitting more sophisticated tissue functions. These functions include (select all that apply):

A. secretion of digestive enzymes. B. muscle contraction/movement. C. the ability to sense the environment via a network of nerve cells. D. the ability to communicate within the organism using hormones. E. none of these

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An automated system uses bead-capture technology in the detection of which of the following spirochetes?

a. Treponema b. Borrelia c. Leptospira d. Brachyspira

Biology & Microbiology

The outermost whorl of a flower typically consists of one or more

a. petals. b. carpels. c. stamens. d. receptacles. e. sepals.

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All organisms that are photosynthetic are oxygenic.

Answer the following statement true (T) or false (F)

Biology & Microbiology