The first hormone discovered was
a. insulin.
b. gastrin.
c. secretin.
d. thyroxine.
e. estrogen.
Answer: c
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Which combination makes the most sense from an evolutionary perspective?
a. light skin and vitamin D deficiency b. light skin and extensive exposure to sun c. dark skin and little exposure to sun d. dark skin and folate deficiency e. light skin and little sun, or dark skin and lots of sun
The DNA in a prokaryotic cell is found in a membrane bound nucleus
1.True 2.False
Antelopes, zebras, giraffes and elephants live in grasslands with scattered trees known as:
1.Savannas 2.Temperate grasslands 3.Temperate rainforests 4.Tundra
Which excretory system contains structures called flame bulbs that function in filtration?
a. metanephridia b. protonephridia c. Malpighian tubules d. kidneys e. nephrons