The difference between taste and smell
a. is how the receptor comes into contact with the binding site, be it direct touch or through
diffusion in the air.
b. depends on the cellular structure of the receptor, specifically, whether the cells are derived
from microvilli or cilia and have microfilaments and microtubules, respectively.
c. is present in al invertebrates that use one receptor for both functions.
d. is the difference between thermoception and photoreception.
e. is based on slight differences in chemoreception.
B
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Why don't steroid hormones bind to transmembrane cell-surface receptors?
A. Steroid hormones don't require receptors because they bind directly to the cell's DNA. B. Steroid hormones are not signaling molecules. C. Steroid hormones are nonpolar and therefore cannot bind to receptors. D. Steroid hormones are nonpolar and cross the cell's plasma membrane, binding to receptors inside the cell.
What level of biological classification is less inclusive than class?
a. domain b. phylum c. kingdom d. order e. division
In the work that they do, a person who studies
phylogeny is most like a
a. police detective. b. medical doctor. c. carpenter. d. college professor. e. real estate agent
The mesoderm is responsible for the formation of all
of the following organ systems EXCEPT the a. reproductive system. b. circulatory system. c. nervous system. d. muscle system. e. excretory system.