BIO 212 exam # 4 questions well
answered graded A+ 2025/2026
Determination occurs when a cell commits to a particular way of specializing but does not show
any obvious specialized properties. - correct answer ✔✔What is determination?
ectoderm, mesoderm, endoderm - correct answer ✔✔From outer to inner list the three germ
layers
B - correct answer ✔✔Atmospheric pressure at sea level is equal to a column of 760 mm Hg.
Oxygen makes up 21 percent of the atmosphere by volume. The partial pressure of oxygen
(PO2) in such conditions is _____.
A. 760/21
B. 0.21 * 760
C. 21/760
D. 120/75
E. 16 mm Hg
Lower altitudes have a higher partial pressure of oxygen - correct answer ✔✔If a girl trained at
high altitudes, then ran her race somewhere with a lower altitude, why is it easier for her to
breath?
D - correct answer ✔✔The fastest possible conduction velocity of action potentials is observed
in ________.
A. Thick, non-myelinated neurons
B. Thin, non-myelinated neurons
, C. Thin, myelinated neurons
D. Thick, myelinated neurons
C - correct answer ✔✔If you increase the bicoid concentration in the entire embryo of a
Drosophila, what would happen?
A. It would increase in size
B. more on the posterior end
C. more on the anterior end
D. with no anterior-posterior body axis
C - correct answer ✔✔A mutation causes follicles to produce less estradiol at the beginning of
their maturation. What effect would this have on ovulation during the ovarian cycle?
A. Ovulation would occur earlier in the cycle
B. Ovulation would occur later in the cycle
C. Ovulation would not occur
D. Ovulation would be unaffected by this mutation
D - correct answer ✔✔Which hormone would be a good early indicator for pregnancy test kits?
A. Estradiol
answered graded A+ 2025/2026
Determination occurs when a cell commits to a particular way of specializing but does not show
any obvious specialized properties. - correct answer ✔✔What is determination?
ectoderm, mesoderm, endoderm - correct answer ✔✔From outer to inner list the three germ
layers
B - correct answer ✔✔Atmospheric pressure at sea level is equal to a column of 760 mm Hg.
Oxygen makes up 21 percent of the atmosphere by volume. The partial pressure of oxygen
(PO2) in such conditions is _____.
A. 760/21
B. 0.21 * 760
C. 21/760
D. 120/75
E. 16 mm Hg
Lower altitudes have a higher partial pressure of oxygen - correct answer ✔✔If a girl trained at
high altitudes, then ran her race somewhere with a lower altitude, why is it easier for her to
breath?
D - correct answer ✔✔The fastest possible conduction velocity of action potentials is observed
in ________.
A. Thick, non-myelinated neurons
B. Thin, non-myelinated neurons
, C. Thin, myelinated neurons
D. Thick, myelinated neurons
C - correct answer ✔✔If you increase the bicoid concentration in the entire embryo of a
Drosophila, what would happen?
A. It would increase in size
B. more on the posterior end
C. more on the anterior end
D. with no anterior-posterior body axis
C - correct answer ✔✔A mutation causes follicles to produce less estradiol at the beginning of
their maturation. What effect would this have on ovulation during the ovarian cycle?
A. Ovulation would occur earlier in the cycle
B. Ovulation would occur later in the cycle
C. Ovulation would not occur
D. Ovulation would be unaffected by this mutation
D - correct answer ✔✔Which hormone would be a good early indicator for pregnancy test kits?
A. Estradiol
