A researcher is comparing the species diversity of two islands. Both islands are roughly equal in size. However, one island is much closer to the mainland
She determines that the S
value for the island closer to the mainland is ____________ the S value for the island located
farther from the mainland. In addition, she finds that the closer island's extinction rate is
_______________ the extinction rate on the farther island.
A. higher than; lower than
B. lower than; higher than
C. higher than; the same as
D. lower than; the same as
E. the same as; higher than
F. the same as: lower than
C
You might also like to view...
The process by which the base sequence of all or a portion of a DNA molecule is used to direct the synthesis of an RNA molecule is called ________.
A. reverse transcription B. transcription C. replication D. translation
Fly species W, found in a certain part of the island, produces fertile offspring with species Y. Species W does not produce fertile offspring with species X or Z
If no other species can hybridize, then which of the following statements about species W and Y are true? I) Species W and Y have genomes that are still similar enough for successful meiosis to occur in hybrid flies. II) Species W and Y have more genetic similarity with each other than either did with the other two species. III) Species W and Y may fuse into a single species if their hybrids remain fertile over the course of many generations. A) Only I is correct. B) Only II is correct. C) Only III is correct. D) I, II, and III are correct.
Mothers and teachers often say they need another pair of eyes on the backs of their heads. And another pair of hands would come in handy in many situations. You can imagine that these traits would have been advantageous to our early hunter-gatherer
ancestors as well. According to sound evolutionary reasoning, what is the most likely explanation for why humans do not have these traits? A) Because they actually would not be beneficial to the fitness of individuals who possessed them. Natural selection always produces the most beneficial traits for a particular organism in a particular environment. B) Because every time they have arisen before, the individual mutants bearing these traits have been killed by chance events. Chance and natural selection interact. C) Because these variations have probably never appeared in a healthy human. As tetrapods, we are pretty much stuck with a four-limbed, two-eyed body plan; natural selection can only edit existing variations. D) Because humans are a relatively young species. If we stick around and adapt for long enough, it is inevitable that the required adaptations will arise.
Actin forms cytoskeletal fibers called ________
Fill in the blank(s) with correct word