The molting hormone of arthropods is:

a. corticotropin
b. MSH
c. oxytocin
d. ecdysone
e. adrenalin


d

Biology & Microbiology

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Which molecule is a disaccharide?

a. sucrose b. agarose c. glucose d. galactose

Biology & Microbiology

What results when nitrogen dioxide and

hydrocarbons react in the presence of sunlight? a. photochemical smog b. industrial smog c. a thermal inversion d. depletions of the ozone layer e. any of these

Biology & Microbiology

Each pollen grain produces two cells, one of which may develop into a(n):

a. polar nucleus. b. pollen tube. c. anther. d. compound pistil. e. filament.

Biology & Microbiology

Refer to the accompanying figure with the lateral line organs of fishes. The structures indicated by label 1 are:


a. hair cells.
b. cupula.
c. stereocilia.
d. sensory neurons.
e. supporting cells.

Biology & Microbiology