Women with breast cancers that are estrogen-sensitive ____
a. become ill when taking prescription estrogen
b. can exacerbate their symptoms with only a small increase in estrogen levels
c. are in danger of faster growth of cancer cells in the presence of estrogen
d. will often experience cancer remission with increased uptake of estrogen
e. do not produce their own estrogen and must obtain it through diet or supplements
c
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The only vertebrates in which blood flows directly from respiratory organs to body tissues without first returning to the heart are the _____
A) amphibians B) birds C) fishes D) mammals E) reptiles
Bioactive specialized compounds that function to protect plants from viral, fungal and bacterial pathogens are ____
a. systemins b. phytoalexins
c. PR proteins d. R genes e. heat-shock proteins
Which reason does not explain the presence of bicarbonate in seawater as being important? a. Bicarbonate makes seawater slightly alkaline
b. Bicarbonate is able to release hydrogen ions in the water. c. Bicarbonate is able to maintain a stable environment for marine organisms. d. Bicarbonate is able to maintain pH levels at a relatively constant value.
At what point in the cycle is meiosis I completed?
1.1
2.2
3.3
4.4
5.5
6.6
7.7
