The accumulation of traits that increase the relative fitness of organisms in their environment over time results in
____.
a. mutation
b. adaptation
c. heterozygote advantage
d. homozygote advantage
e. diploidy
ANSWER: b
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A pine tree is called a sporophyte because it
a. develops from a germinated spore. b. produces spores by meiosis. c. is haploid. d. undergoes fertilization. e. reproduces by both sexual and asexual means.
A possible reason why humans have fewer genes than the number anticipated by scientists is that
a. humans don’t need more than 25,000 genes to function. b. the exons used to make a specific mRNA can be rearranged to form different proteins. c. the sample size used to sequence the human genome was not big enough, so the number of genes estimated could be low. d. the number of genes will increase as scientists find out what all of the noncoding DNA actually does.
Humans who have lost one copy of an autosome are called
A. monoploid. B. haploid. C. trisomic. D. bisomic. E. monosomic.
If you are trying to prove that A causes B, why does it make sense to have your null hypothesis be "A does not cause B"?
A. We must allow for B to cause A. B. It is easier to make strong inductive arguments when rejecting a hypothesis. C. Data cannot confirm a hypothesis and it is easier to make strong inductive arguments when rejecting a hypothesis. D. Data cannot confirm a hypothesis.