After the publication of On the Origin of Species, the idea of evolution was generally accepted. What part of Darwin’s
theory of evolution, however, was fiercely debated?
a. natural selection
b. environmental change
c. gradual change
d. the old age of the Earth
e. limited resources
ANSWER: a
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Answer the following statements true (T) or false (F)
1. The fast block to polyspermy occurs through a rapid increase in cytosolic calcium within the egg. 2. The sperm and its DNA enters the egg through simple diffusion through the egg plasma membrane. 3. The cortical reaction prevents multiple sperm from contributing their chromosomes to the egg. 4. Most of the egg yolk found in certain vertebrates is restricted to the animal pole?
When the body experiences stress, the sympathetic division of the autonomic nervous system
stimulates the adrenal medulla to release
a. epinephrine. b. norepinephrine. c. knockout hormones. d. epinephrine and norepinephrine. e. epinephrine, norepinephrine, and knockout hormones.
State the difference between a transgenic animal and a cloned animal.
What will be an ideal response?
Describe the mechanisms that lead to multiple births. What will be an ideal response?