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If you can please explain your answers:
35. in mammals, which of the following are produced after rearrangement of DNA swequences in specific cells?
a. Hemoglobins
b. actins
c. Antigens
d. Antibodies
E. Trypsins
51. of the following, which appears first in the fossil record?
a. Insects
b. corals
c. octopi
d. Amphioxi
e. lamprey eels
84. All of the following maybe true of a population with a stable age distribution EXCEPT:
A. The # of organism is changing at a constant rate.
b. Age-specific birth and death rates are not changing over time.
c. Population size is increasing.
d. The proportions of organisms in each age class are changing.
e. population size is decreasing.
D is the answer.
105. Which of the following is a postzygotic isolating mechanism in speciation?
a. isolation by hybide sterility
b. Geographic isolation
c. behavioral isolation
35. in mammals, which of the following are produced after rearrangement of DNA swequences in specific cells?
a. Hemoglobins
b. actins
c. Antigens
d. Antibodies
E. Trypsins
51. of the following, which appears first in the fossil record?
a. Insects
b. corals
c. octopi
d. Amphioxi
e. lamprey eels
84. All of the following maybe true of a population with a stable age distribution EXCEPT:
A. The # of organism is changing at a constant rate.
b. Age-specific birth and death rates are not changing over time.
c. Population size is increasing.
d. The proportions of organisms in each age class are changing.
e. population size is decreasing.
D is the answer.
105. Which of the following is a postzygotic isolating mechanism in speciation?
a. isolation by hybide sterility
b. Geographic isolation
c. behavioral isolation
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