Nonprotein coding pieces of pre-mRNA that are removed during RNA splicing are called ________
A) introns
B) exons
C) SNPs
D) promoters
E) poly(A) tails
A
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Nutrients reach cells in the epidermis by ________
A) moving out of dermal blood vessels and diffusing through tissue fluid to the epidermis B) moving out of blood vessels in the epidermis C) moving out of blood vessels that originate in the hypodermis and extend into the epidermis D) All of the above are true.
In a human population with a high proportion of prereproductive individuals, the population will:a
continue to increase even if the fertility rate is at replacement levels. b. decline even if the fertility rate is at replacement levels. c. increase only if the fertility rate is above replacement levels. d. decline only if the replacement level fertility rate changes. e. reach ZPG sooner than with a low proportion of prereproductive individuals.
What effect does pruning flowers have on a plant?
A) The plant will make more flowers than normal. B) The new flowers that grow will be larger. C) The plant will produce more leaves. D) The plant will produce fruits instead of flowers.
At which phase of the growth curve is replication rate equal to death rate?