In order for a species to be successfully reintroduced into an area,
a. hunting must be restricted.
b. populations of the animals cannot be too small.
c. suitable habitat must be maintained.
d. all of these
D
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A certain female's number 12 chromosomes both have the blue gene and number 19 chromosomes both have the long gene. As cells in her ovaries undergo meiosis, her resulting eggs (ova) may have which of the following?
A) either two number 12 chromosomes with blue genes or two with orange genes B) either two number 19 chromosomes with long genes or two with short genes C) either one blue or one orange gene in addition to either one long or one short gene D) one chromosome 12 with one blue gene and one chromosome 19 with one long gene
Approximately one month upon return from a river rafting trip in South America, a college student develops a fever accompanied by chills, muscle aches, and abdominal discomfort. After being examined by physicians at the university health center, the student is referred to an infectious disease specialist where a diagnosis of schistosomiasis is made. Schistosoma is a helminth that contaminates freshwater in areas that lack proper sanitation, and often leads to infection when the water is used for swimming or bathing. In this case, bloodwork from the student would most likely reveal an elevation in which of the following cells?
A. Basophils B. Erythrocytes C. Eosinophils D. Platelets
DNA methylation is the only known natural modification of DNA. It affects
A. cytosine bases. B. thymine bases. C. guanine bases. D. adenine bases.
A mutation causes a gene to become overactive, contributing to uncontrolled cell growth. Which term best describes this gene?
A. tumor-suppressor gene B. oncogene C. spliced gene D. malignant gene E. alternatively spliced gene