In female gamete development in humans and other vertebrates, the net result of meiosis is the production of one large egg and three small cells with very little cytoplasm. These three small cells:
a. degrade almost immediately.
b. fertilize the egg.
c. divide to form secondary egg cells.
d. fuse together to form the placenta.
e. act to nurse the egg cell.
Ans: a. degrade almost immediately.
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The discovery of the fossilized remains of Archaeopteryx in 1860 set forth the hypothesis of birds being closely related to
A. dinosaurs. B. salamanders. C. bats. D. butterflies. E. bees.
What is the first step in the Calvin cycle?
a. O2 attaches to CO2. b. O2 attaches to G3P. c. CO2 attaches to RuBP. d. CO2 attaches to Rubisco. e. CO2 attaches to phosphoglycerate.
In 1 mL of blood, there are 1.5 million white blood cells
a. true b. false
In humans, assume that brown eyes is dominant and blue eyes is recessive. If two brown-eyed individuals have a child with blue eyes, that means:
a. both parents are homozygous for brown eyes. b. both parents are heterozygous for eye color. c. there is a 1/4 chance that their second child will have brown eyes. d. there is a 50/50 chance that their second child will have blue eyes. e. None of the above.