Terrestrial vertebrates and some fish evolved a form of fertilization in which the male gametes are introduced into the female reproductive tract. What is this called?
A. internal fertilization
B. synchronous fertilization
C. external fertilization
D. asexual fertilization
Answer: A
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The variable region of a light chain is indicated by ____
a. A b. B c. C d. D e. E
Alpha helices and beta sheets are characteristic of protein
A) primary structure. B) secondary structure. C) tertiary structure. D) quaternary structure. E) enzymatic structure.
If the hemoglobin molecules in your red blood cells suddenly were unable to bind carbon dioxide and hydrogen ions, what would happen to your blood pH?
A) It would increase. B) It would stay the same. C) It would decrease.
Geographically isolated subpopulations of a species can evolve partial reproductive isolation in allopatry
If both subpopulations come into secondary contact, they can either fuse into one mixed population, or, dur-ing a process called reinforcement, selection will lead to greater reproductive isolation. The latter will occur if mating with individuals from the other subpopulation reduces an individual's fitness, as the resulting hybrid offspring has lower fitness. Could cultural evolution play a role in reinforcement? a. Yes, if traits that affect reproductive isolation can be culturally transmitted. b. Yes, but only if there is zero cultural transmission between subpopulations. c. No, in order to form separate species, the changes have to be genetic. d. No, culturally transmitted behavioral traits are bound to be "leaky" (allow for some level of gene flow).