It is possible to remove calcium from compact bone by soaking the bone in vinegar for an extended period of time. Once the calcium is gone, the bone should be
A) more rigid and inflexible. B) about half the size as before soaking.
C) extremely flexible. D) completely dissolved.
C
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A key difference between hormonal regulation of the reproductive systems of males and females is that:
A. LH and FSH are released only in females. B. LH and FSH are released only in males. C. LH and FSH are released cyclically in females but nearly continuously in males. D. LH is released in males and FSH is released in females. E. LH is released continuously in males and FSH is released cyclically in females.
Where is rain more acidic in the United States?
1.East Coast
2.Midwest
3.Pacific northwest
4.West Coast
The region(s) where a countercurrent mechanism
operates is (are) indicated by a. A. b. B. c. C. d. D. e. C and D.
Initial studies of the influenza A virus by Walter Fitch and colleagues showed that ________
A) influenza A actually has DNA as its genetic material B) selection is causing influenza A to become more virulent over time C) selection by the immune system drives change in hemagglutinin's antigenic sites D) protein evolution in influenza A is consistent with the neutral theory E) flu strains from one host cannot exchange genetic material with strains from another