Which of the following is NOT known to be a contributing factor to male infertility??
Ans: cystic ovaries
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Chlorophyll a appears green to the human eye because it ________
a. absorbs green light b. absorbs violet and red light c. reflects blue light d. reflects violet and red light
In eukaryotic cells, how can a single gene encode for more than one protein?
A. by using different codons B. by transcribing multiple copies of mRNA C. by removing different combinations of introns D. by using transgenes E. by mutating their genes
The removal of the ____ gland(s) will disrupt
normal blood clotting and muscle contraction. a. thymus b. thyroid c. pituitary d. parathyroid e. pancreas
Pseudocoelomates have a body cavity that is not completely lined with __________. These animals
include __________ and roundworms. a. endoderm; nemerteans b. endoderm; flatworms c. mesoderm; rotifers d. mesoderm; flatworms e. mesoderm; nemerteans