A trait that confers a greater level of fitness, relative to those who lack it, is called a(n) ________
A) adaptation
B) mutation
C) variation
D) allele
E) None of the above.
A
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The correct sequence in body forms and life stages occurring in alternation of generations in green algae protists is
A. sporophyte - meiosis division - mitotic division - spores - gametophytes - fertilization - gametes - zygote. B. gametophytes - gametes - sporophyte - meiosis division - spores - mitotic division - fertilization - zygote. C. sporophyte - meiosis division - spores - mitotic division - gametophytes - gametes - fertilization - zygote. D. gametes - meiosis division - spores - mitotic division - gametophytes - sporophyte - fertilization - zygote. E. gametophytes - gametes - sporophyte - mitotic division - spores - meiosis division - fertilization - zygote.
What has sequencing the genomes of modern humans, nonprimates, Neanderthals, and Denisovans determined about the relationship between modern humans and other lineages?
A) Denisovans and Neanderthals lived together in Europe about 30,000 years ago and interbred with each other. B) The lineages leading to Denisovans, Neanderthals, and modern humans diverged 800,000 years ago and the different lineages did not exist at the same time. C) Modern humans lived together with Neanderthals in Africa and interbred with them. D) Modern humans are the direct descendants of Neanderthals. E) Modern humans lived together and interbred with Denisovans in parts of Asia and the south Pacific.
Acetyl can be a substrate for a number of different reactions involving different enzymes and resulting in different products. This situation can be described as
A. enzymatic inhibition. B. negative-feedback inhibition. C. substrate competition. D. enzymatic competition.
A small group of mice were released on an island. The island previously had no mice on it, but had abundant food and no predators. After several years of growth, the size of the new island population stabilizes. However, at this point a hurricane drastically reduces the population. How would you describe the situation?
A. The new population size is a result of density-dependent regulation. B. The biotic potential of the population has been reduced. C. The island mouse population can now act as a source metapopulation. D. The new population size is a result of density-independent regulation. E. The island mouse population can now act as a sink metapopulation.