A needle pierces through the epidermal layers of the forearm in which of the following order?
A) basale, spinosum, granulosum, corneum
B) basale, spinosum, granulosum, lucidum, corneum
C) granulosum, basale, spinosum, corneum
D) corneum, granulosum, spinosum, basale
D) corneum, granulosum, spinosum, basale
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The DTaP vaccine contains
A) purified bacterial DNA. B) bacterial endotoxin derivatives. C) heat-killed Bordetella pertussis cells. D) diphtheria toxoid.
Which of the following is not a role for methylation?
A. Methylation can protect bacterial RNA from restriction enzymes that are used to destroy viral DNA. B. Methylation of DNA can act as an inhibitor of gene expression. C. Methylation of DNA can enhance binding of certain proteins. D. Methylation is important in directing mismatch repair to repair the correct DNA strand. E. Methylation in eukaryotes can affect the formation of Z-DNA.
The collection of sperm from a male and the use of that sperm to impregnate a female of the same
species is called:a. host mothering. b. artificial insemination. c. in situ conservation. d. in vitro fertilization. e. ex situ conservation.
In a positive feedback cycle, drought encourages ____, which results in more drought.
A. overgrazing B. biological magnification C. bioaccumulation D. desertification E. deforestation