The importance of dietary fiber includes all of the following EXCEPT
Select one:
a. dilution of bile salts.
b. addition of bulk to the digestive tract.
c. a decreased risk of constipation.
d. a possible decreased risk of polyp formation.
e. increased blood cholesterol levels.
e. increased blood cholesterol levels.
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LOD (logarithm of the odds) scores are used to indicate linkage between genes. A LOD score of ________ or greater is a strong indicator of linkage.
A) 0.5 B) 1 C) 2 D) 3
Maternal effect mutations can be identified when
A) homozygous mutant females exhibit an abnormal phenotype, whereas mutant males appear wild-type. B) homozygous mutant females can develop normally, but their offspring exhibit a mutant phenotype. C) heterozygous mutant females can develop normally, but their offspring exhibit a mutant phenotype. D) any aspect of embryonic development is abnormal.
If an amphibian zygote is manipulated so that the first cleavage plane does not divide the gray crescent, what is the expected fate of the two daughter cells?
A) The daughter cell with the entire gray crescent will die. B) Both daughter cells will develop normally because amphibians are totipotent at this stage. C) Only the daughter cell with the gray crescent will develop normally. D) Both daughter cells will develop abnormally. E) Both daughter cells will die immediately.
True or False: Endotoxins are the secreted products of living cells, whereas exotoxins are cell bound and released in large amounts ONLY when the cells lyse
a. TRUE b. FALSE