Which of the following is not evidence for the endosymbiotic theory?
A) Chloroplasts and mitochondria contain ribosomes that resemble prokaryotic ribosomes.
B) Chloroplasts and mitochondria contain their own DNA that resembles prokaryotic DNA.
C) Chloroplasts and mitochondria have structures that resemble prokaryotic cell walls.
D) Chloroplasts and mitochondria reproduce using binary fission, like prokaryotic cells.
Answer: C) Chloroplasts and mitochondria have structures that resemble prokaryotic cell walls.
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Which one of the following statements about evolution is incorrect?
A. Evolution of bacteria can be demonstrated in a laboratory by selecting for increases in various metabolic processes. B. Evolution led to the branches in the tree of life, but development of the organisms within a single branch has subsequently remained constant. C. Closely related species display a nested pattern of similarity. D. Organisms that are best able to reproduce contribute disproportionately to subsequent generations. E. Evolution can have its root in both genetic and environmental forces.
Which of the following is NOT a function of some
leukocytes? a. engulf and destroy damaged or dead cells b. engulf anything recognized as “nonself” c. call up specific immune responses d. carry out specific immune responses e. secrete substances that initiate blood clotting
A nucleus within an ascus undergoes meiosis, producing four haploid spores, which then undergo mitosis, producing eight haploid ascospores. These haploid ascospores contain a maximum of _____ different genetic types.
a) one b) two c) three d) four e) five
Which one of the following will prevent significant genetic drift?
A) Gene flow is absent. B) There is genetic variation. C) There is mutation. D) The population size is large.