What is the definition of "swidden"?
A) tundra
B) slash-and-burn agriculture
C) the boreal forest
D) biome
B
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What is the function of mammalian apocrine glands?
a. sweat secretion b. waste excretion c. scent secretion d. lipid secretion
Nitrogen, with an atomic number of 7, has
____ electrons in the first energy level and ____ electrons in the second energy level. a. 1; 6 b. 2; 5 c. 3; 4 d. 4; 3 e. 5; 2
The bands on chromosomes correspond to
A. gene-poor regions. B. gene-rich regions C. regions where specific proteins attach to the chromosomes. D. regions actively transcribing RNA. E. regions where genes are not transcribing RNA.
A population of 1,000 birds exists on a small Pacific island. Some of the birds are yellow, a trait determined by a recessive allele. The others are green, a characteristic determined by a dominant allele. A hurricane on the island kills most of the birds from this population. Only ten remain, and those birds all have yellow feathers. Which of the following statements is true?
A) Assuming that no new birds come to the island and no mutations occur, future generations of this population will contain both green and yellow birds. B) The hurricane has caused a population bottleneck and a loss of genetic diversity. C) This situation illustrates the principle of adaptive radiation. D) This situation illustrates the effect of a mutation event. E) The ten remaining birds will mate only with each other, and this will contribute to gene flow in the population.