Which of the following may contribute to pregnancy problems?
a. taking naps
b. being active
c. being over 30
d. having dietary deficiencies
e. having limited protein intake
ANSWER: e
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The larva in the accompanying figure is characteristic of which group of organisms?
a. mollusks b. cnidarians c. nematodes
d. arthropods e. platyhelminthes
During the spring, you are studying the mice that live in a field near your home. There are lots of mice in this field, but you realize that you rarely observe any reproductive females. This most likely indicates
A) that there is selective predation on female mice. B) that female mice die before reproducing. C) that this habitat is a good place for mice to reproduce. D) that you are observing immigrant mice. E) that the breeding season is over
If a human female has 2 Barr bodies per cell, it is almost certain that
A. her mother also had 2 Barr bodies per cell. B. her father had 1 Barr body per cell. C. she developed from a fertilized egg with 3 X chromosomes. D. she is genetically a male with female characteristics. E. she is genetically a normal fertile female.
What forces filtratin at the glomerular capsule?
A) The changing size of the blood vessel B) The pH difference across the filtration membrane C) The absence of a brush boarder D) The abundance of surface area