The most common planktonic stage of the majority of marine gastropod species is the:
a. trochophore larva.
b. veliger larva.
c. megalopa larva.
d. zoea larva.
e. planula larva.
B
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A species that has population levels so low it faces
extinction in all or part of its range is designated as a. riparian. b. endemic. c. endangered. d. fragmented. e. an indicator.
The receptors in post-synaptic cells are the basis on which the synapse can be defined as inhibitory or excitatory.
a. true b. false
Which activity would result in a decrease in your ecological footprint?
A) flying across the United States once a month B) driving your car to and from school every day C) leaving the water running while you brush your teeth D) taking a city bus instead of driving to work
In a species such as elephant seals, in which males are significantly larger than females, the most likely mating system is:
a. polyandry. b. promiscuity. c. monogamy. d. It is impossible to predict the mating system with only this information. e. polygyny.