The process of meiosis results in ____
A. the production of four identical cells
B. no change in chromosome number from parental cells
C. a doubling of the chromosome number
D. a reduction in chromosome number
E. two diploid cells
D
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An organism originally has a diploid number of 66 chromosomes. No meiosis occurs in this organism (gametes are diploid). Assume that the polyploid organism produced by union of the gametes is viable, and that the resulting organism also does not carry out meiosis. Also assume that this is true for future offspring of these organisms. If these organisms continue to mate, how many chromosomes will be found in a cell of the original organism's great grandchild?
A) 33 B) 66 C) 132 D) 264 E) 528 F) 1,056
The sheaths that surround neurons are composed of
a. amino acids. b. lipids. c. cholesterol. d. carbohydrates e. polysaccharides.
Nitrous oxide
a. is a more potent greenhouse gas than carbon monoxide b. is released in the burning of fossil fuels c. destroys the ozone d. is found in synthetic fertilizers e. is all of the above
Earthworms differ from most of the marine annelids in that earthworms
a) develop from a larval form, while marine annelids do not. b) lack paddle-like parapodia that marine annelids have. c) have well-developed brains and sensory organs in the head region, while marine annelids do not. d) have segments, while marine annelids do not. e) lack setae that marine annelids have.