Which best describes a result of sexual reproduction?
a. The only source of variation is mutation.
b. Clones of the original cell are produced.
c. One cell divides to produce two identical cells.
d. Two sex cells combine to form a fertilized cell.
e. The offspring obtain genes only from one parent
d
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The 1997–1998 El Niño resulted in all of the
following EXCEPT a. crop failures and wildfires in Australia and Indonesia. b. the death of many seals and sea lions. c. massive flooding and landslides. d. a massive ice storm in the southwestern United States. e. massive flooding in California and Peru
A marine fish with a cold body temperature that matches its cold surroundings is an example of
A. regulating. B. conforming. C. conditioning. D. negative feedback.
Plants with mutant ABA receptors are likely to have problems with
A. pollen tube formation. B. fertilization. C. seed dormancy. D. endosperm formation.
What mode of transmission increases, stabilizes, then decreases?
A. Water B. Fomite C. Droplet D. Parenteral E. Biological vector