Which phrase would most likely be used in a discussion of homeostasis?
A. Respond to environmental stimuli
B. Limited range of variation
C. Rapid energy turnover
D. Both respond to environmental stimuli and limited range of variation
E. Both respond to environmental stimuli and rapid energy turnover
Answer: B
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Which one of the following statements does not accurately describe the sex chromosomes?
A. The X chromosome has a gene density similar to most autosomes. B. In contrast to the approximately 1000 genes on the X chromosome, the Y chromosome contains only about 50 genes. C. The relative size and gene content of the X and Y chromosomes is very similar across species. D. Crossing over between the X and Y chromosomes occurs in very small regions of homology between the two chromosomes. E. Crossing over between the X and Y chromosomes allows the sex chromosomes to align correctly during metaphase I and separate from each other during anaphase I.
How much larger do eukaryotic cells tend to be than prokaryotic cells?
a. 150–1000 times larger b. 10–100 times larger c. 5–10 times larger d. 1000 times larger or more
Which of the following variables is the coefficient that estimates decomposition rate?
A) e B) k C) t D) d
When a nucleus of a cell from an adult is inserted to another enucleated and unfertilized egg it gives rise to a genetically identical individual. This procedure is known as
A) Embryo cloning B) Adult cloning C) Therapeutic cloning D) None of the above