All known heritable symbionts of insects
a. can replicate outside of the hose.
b. can become parasites of the host.
c. cannot replicate outside of the host.
d. are required for host replication.
Answer: C
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What is the response of a cell surface receptor to the binding of a signal molecule?
a. The cell surface receptor denatures. b. The signal is transduced through the plasma membrane into the cell. c. The receptor relays a signal to another location of the cell surface. d. The cell surface receptor flips through the membrane to the inside of the cell. e. Polarization of the cell surface changes.
A table listing such items as age, observed number of organisms alive each year, and life expectancy is known as a (an)
A) life table. B) mortality table. C) survivorship table. D) rate table. E) insurance table.
Parapatric speciation occurs most often ____.
A. within in the same home range B. populations inhabiting different areas while maintaining contact along a common border C. within a group of interbreeding populations D. on either side of geographic barriers E. by polyploidy
Which statement best describes the relationship between elevation and latitude?
A. Elevation and latitude are related because they are both measurements of distance. B. Elevation and latitude are related because they have similar effects on temperature. As the elevation increases, the temperature of the air increases, which is likewise with latitude. C. Elevation and latitude are related because as one increases the other increases. D. Elevation and latitude are related because they have similar effects on temperature. As the elevation increases, the temperature of the air decreases, which is likewise with latitude.