Why is fertilization in flowering plants called
double fertilization?
a. it takes two pollen grains to fertilize a
single ovule
b. two ovules must be fertilized to form a
single seed
c. two cells in the ovule are fertilized, the egg
and the endosperm mother cell
d. one pollen grain fertilizes two ovules
e. it takes the efforts of two flowers (male and
female) to produce seeds
C
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The deepest diving pinnipeds are the:
a. sea lions. b. harbor seals. c. Weddell seals. d. elephant seals. e. Stellar's sea lion.
Darwin's theory states, in part, that individuals with certain traits have an increased competitive edge. What is the
source of these traits? a. adaptation to stress b. development over a lifetime c. inheritance d. mutation after birth e. better living conditions
Red blood cells originate in the
a. liver. b. spleen. c. yellow bone marrow. d. red bone marrow. e. thymus gland.
An autoimmune disorder in which an immune response targets Type V collagen fibers is most likely to affect the
A) skin. B) heart. C) lungs. D) stomach. E) tongue.