Nutrients reach cells in the epidermis by ________
A) moving out of blood vessels that originate in the hypodermis and extend into the epidermis
B) moving out of blood vessels in the epidermis
C) moving out of dermal blood vessels and diffusing through tissue fluid to the epidermis
D) All of the above are true.
Answer: C
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Pairs of chromosomes that are similar in size and genetic composition are
a. chromatids. b. diploid. c. haploid. d. chromatin. e. homologous chromosomes.
When a runner or other long-distance athlete hits the "wall," the individual is experiencing oxygen debt in muscle cells. In those cells, the pyruvate generated in glycolysis would be expected to be converted to
A) fat. B) lactic acid. C) glucose. D) carbon dioxide. E) water.
If stretching to improve flexibility is to be beneficial, it should incorporate exercises that cause some pain.
a. true b. false
Species that have a delayed reproductive stage, are competing for limited resources and have smaller numbers of slowly maturing large offspring show ________ adaptations.
A. K-selected B. r-selected