The absence of a terminator in transcription will result in ________
A) the creation of a virus
B) a strand of mRNA that lacks its cap and tail
C) the production of a longer RNA molecule
D) the production of a shorter RNA molecule
C
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Which of the following is NOT one of the signs of aging in the skin?
a. increased collagen b. reduced fibroblasts c. increase in sweat glands d. less pigmentation in hair e. increased fat deposits
______ stimulates the interstitial cells of the testes to secrete __
Fill in the blank(s) with the appropriate word(s).
Which of these is not a method used by ectotherms to affect body temperature?
A. dilation or contraction of blood vessels B. shivering C. countercurrent heat exchange D. increasing metabolic rate E. basking in the sun
Any substance that triggers an immune response in the body is called a(n) ________
A) memory cell B) MHC marker C) complement D) antigen