How do mass extinction events influence subsequent species composition and diversity?
A. by immediately increasing species
diversity
B. by permanently altering climate
C. by reducing competition among surviving
organisms
D. by eliminating smaller organisms instead
of larger organisms
C
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The membrane protein that is bound by a chemical signal is called the ____
Fill in the blank with the appropriate word.
Steroid hormone-receptor complexes act in _____.
Fill in the blank(s) with the appropriate word(s).
Which of the following is an example of heterotrophy?
A. Teeth in a lizard's head resemble each other in morphology B. Axolotls grow to full size but do not undergo metamorphosis, so that they retain many juvenile characteristics C. During human postnatal growth, the head grows at a slower rate than the body while the legs grow at a faster rate D. Entire young plants develop on the leaf margins of the Mother of Thousands
In order for transmission across the synapse to occur,
Select one: a. synaptic vesicles fuse with the postsynaptic membrane. b. neurotransmitters are released from the postsynaptic membrane. c. synaptic vesicles fuse with the presynaptic membrane. d. neurotransmitters are actively transported from the presynaptic to the postsynaptic membrane. e. the postsynaptic membrane must be in the refractory period.