Which of the following is an incorrect description of a blood vessel type?
A) Veins have high compliance.
B) Most of the blood volume at rest is in the systemic veins.
C) Arteries are elastic.
D) The radius of arterioles can be regulated by both intrinsic and extrinsic controls.
E) Capillary walls are comprised of only two cell layers, minimizing the distance for exchange.
Ans: E) Capillary walls are comprised of only two cell layers, minimizing the distance for exchange.
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Sexual selection typically results in sexual dimorphism, a situation in which ________
a. one male mates with many females b. one female mates with many males c. plants secrete scents that mimic insect sex hormones d. the males and females of a species show distinct phenotypic differences
Which of the following is not one of the basic types of animal tissue?
1.epithelial 2.connective 3.muscle 4.vascular
A genomic library is a collection of:
a. plasmid fragments that are spliced into DNA. b. DNA fragments that are spliced into plasmids. c. intron fragments that are spliced into plasmids. d. exon fragments that are spliced into bacterial cells. e. gene fragments that are spliced into main bacterial chromosom
A single gene always encodes an enzyme.
Answer the following statement true (T) or false (F)