The female hormones that participate in milk production for the newborn are
a. prolactin and oxytocin.
b. prolactin and estrogen.
c. prolactin and progesterone.
d. oxytocin and estrogen.
e. oxytocin and progesterone.
A
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What is this phenomenon called and what affect does this mutation have on
GGG and GGC are codons for the amino acid, glycine. A mutation caused the insertion of a cytosine in place of the guanine during DNA replication. Over many generations the DNA changes so that the frequency of GGC is similar to that of GGG.
A. directional selection; that has resulted in genetic uniformity in the species.
B. a bottleneck effect; decreases the number alleles in the population.
C. stabilizing selection; that reduced genetic diversity within the species.
D. adaptive variation; resulting in reduced genetic diversity in females because the GGC coded for bright feather color instead of the mottled brown feather color coded for by GGG.
E. neutral variation; the change in genetic code does not cause a change in phenotype therefore there is no change in reproductive success. This mutation then does not affect the population.
Which one of the following is the major energy storage compound of plant seeds?
A. amylose B. glycogen C. cellulose D. lipids E. oils
Protists
A) develop embryos during reproduction. B) are prokaryotic. C) carry out photosynthesis without chloroplasts. D) form a single clade. E) obtain nutrition through a variety of different methods.
The phenomenon known as species resistance is a highly specific defense against infectious agents
Indicate whether the statement is true or false