A nauplius larva is characteristic of:
A. echinoderms.
B. gastropods.
C. molluscs.
D. crustaceans.
E. ctenophores.
D
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Which marine zone would have the lowest rates of primary productivity (photosynthesis)?
A) pelagic B) abyssal C) neritic D) continental shelf E) intertidal
When you prune the tips off of branches, the
plant tends to become more shrubby, this is due to
a. apical dominance release. b. removal of auxin. c. increased levels of cytokinin. d. the development of lateral shoots. e. a combination of all of these factors.
Humans are susceptible to scurvy because
A. they do not have enough adipose tissue for vitamin A storage. B. they cannot synthesize vitamin C. C. they have a high incidence of fruit allergies. D. constant seasickness and nausea on long voyages leads to weakness and anemia. E. they cannot synthesize amino acids.
Water molecules can form hydrogen bonds with _____
A) compounds that have polar covalent bonds B) oils C) oxygen gas (O2 ) molecules D) chloride ions