The skin serves as which type of defense against pathogens?
A) innate response
B) protective immunity
C) barrier to infection
D) complement
E) adaptive immunity
Answer: C
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Assume some types of wild rice produce seeds of two different colors—brown and white. If
you cross two plants and end up with three seed colors—brown, tan, and white, you would correctly assume that this trait __________.
a. exhibits incomplete dominance b. is polygenic c. is pleiotropic d. exhibits codominance
Distances between linked genes in centimorgans (cM) can be converted directly to the physical distances between them
on the chromosome. a. True b. False
Based on electron configuration, which of the elements in the figure above would exhibit a chemical behavior most like that of oxygen?
A) carbon B) nitrogen C) sulfur D) phosphorus
Touching a jellyfish can be a very painful experience whereas touching a comb jelly is not painful. Why is there a difference?
A. Ctenophores only use nematocycts for feeding, not for defense. B. Ctenphores do not possess nematocysts. C. Nematocysts in ctenophores lack venom. D. Ctenophores have very reduced nematocysts that cannot penetrate human skin.