Specialized epidermal outgrowths that remove excess salt accumulated in seashore plants are an example of:

a. plasmodesmata.
b. guard cells.
c. stomata.
d. sclereids.
e. trichomes


e

Biology & Microbiology

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An agent that can cause birth defects is known as a(n)

a. teratogen. b. mutagen. c. carcinogen. d. haptene. e. allergen.

Biology & Microbiology

Which group of protists are unicellular, biflagellate stramenopiles that forms a significant portion of the

nanoplankton? a. ciliates b. red algae c. golden algae d. foraminifera e. brown algae

Biology & Microbiology

Many species of which protist group have modified mitochondria that lack functional electron transport chains?

A) excavates B) rhizarians C) ciliates D) unikonts

Biology & Microbiology

What is an oncogene?

a. genes that trigger apoptosis in malignant cancer cells b. carcinogenic viral DNA inserted into human DNA c. a gene that may cause cancer when it has been mutated d. a duplicate of a damaged gene that prevents cancer

Biology & Microbiology