In comparing the chromosomes of humans, chimpanzees, gorillas, and orangutans, what type of genomic evolution has occurred in chromosome 2 in the human, as compared with the other three species?
A. fusion.
B. duplication.
C. inversion.
D. inversion followed by duplication.
E. fragmentation.
Answer: A
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Considering the global carbon cycle, where are humans having a great impact?
I) terrestrial ecosystems II) oceans III) atmosphere A) only I B) only II C) only III D) only I and III E) I, II, and III
The mitochondrion
a. has its own DNA. b. DNA has few noncoding regions between genes. c. resembles bacteria in size. d. resembles bacteria in structure. e. is all of these.
An accident victim receives a blood transfusion. Shortly thereafter, he begins to have difficulty breathing, develops a fever, and experiences nausea and vomiting. Which of the following is the most likely interpretation of these events?
A) the blood transfusion was mismatched. B) the blood transfusion contained pyrogens. C) the recipient had previously been exposed to foreign blood group antigens. D) the blood transfusion was mismatched and contained pyrogens. E) the blood transfusion was mismatched and the recipient had previously been exposed to the foreign blood group antigens.
The Ames Test uses______ to determine the ability of a compound to cause______.
a) Bacteria, AIDS b) Viruses, Cancer c) Bacteria, Cancer d) Viral cells, AIDs