In a healthy female, how many secondary oocytes would be expected to form from 100 primary oocytes? How many first polar bodies would be expected from 100 primary oocytes?
A) 200; 50 B) 100; 50 C) 100; 100 D) 50; 50 E) 200; 200
C
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The population of American bison used to number in the millions. Hunting and other problems greatly decreased the number of bison to about 1,000. Today, the numbers are recovering to estimates of more than 200,000 bison. This crash in the population of bison and recent recovery is an example of ______
A. gene flow B. genetic drift C. the bottleneck effect D. the founder effect
In the accompanying figure, which combination of letters accurately represents two sister chromatids?
a. A and B
b. A and C
c. A and D
d. A and E
e. B and F
DNA ligase links two ____ DNA fragments by ____ bonds
a. complementary; hydrogen b. circular; covalent c. palindromic; covalent d. linear; covalent e. linear; hydrogen
According to the clip, what is the main function of photosynthesis?
a) harvest energy from glucose b) harvest energy from carbon dioxide c) release oxygen into the atmosphere d) make sugars for food e) make green plant materialff