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
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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
An agent that can cause birth defects is known as a(n)
a. teratogen. b. mutagen. c. carcinogen. d. haptene. e. allergen.
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
Many species of which protist group have modified mitochondria that lack functional electron transport chains?
A) excavates B) rhizarians C) ciliates D) unikonts