Which of the following events is likely to precede adaptive radiation?
a. A few individuals fly over to an island in the middle of a river.
b. An avalanche of rocks falls off a mountain into a small lake.
c. A new species evolves gradually over long periods of time.
d. The ability to lay water-retaining eggs on land evolves.
e. A population is split by the upthrust of a new mountain range.
Ans: d. The ability to lay water-retaining eggs on land evolves.
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Which of the following pairs is MISMATCHED?
A) animals; usually diploid B) fungi; usually diploid C) protozoa; usually diploid D) slime mold; usually haploid E) plants; usually diploid
The smallest unit that has all of the characteristics of life is the
(a). cell. (b). tissue. (c). organ. (d). organ system. (e). organism.
Pancreatic cells synthesize and export large quantities of digestive enzymes; to support this activity they must _____.
A) have more Golgi bodies than typical cells B) be multinucleated C) have a large number of lysosomes D) be larger than typical cells E) have more peroxisomes than typical cells
Which gas was not present in the Miller-Urey experiment? a. All of them were present
b. CH4 (methane) c. H2O (water) d. H2 (hydrogen gas) e. NH3 (ammonia)