If the right optic nerve were cut, what would still remain?
a. the inner portion of the left visual field and the outer portion of the right visual field
b. the outer portion of the right visual field and the inner portion of the left visual field
c. the inner portion of the right visual field and the inner portion of the left visual field
d. the inner portion of the right visual field and the outer portion of the left visual field
e. the entire right visual field
D
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Which of the following characterizes parthenogenesis?
A) An individual may change its sex during its lifetime B) Specialized groups of cells grow into new individuals C) An organism is first a male and then a female D) An egg develops without being fertilized E) Both mates have male and female reproductive organs
How would the phenotypes of progeny differ if a trait was produced from the influence of many genes, compared to a trait caused by a single gene with two alleles and incomplete dominance?
A. They would not differ, and progeny in both would have an array of phenotypes that vary continuously across a range. B. The progeny from the single-gene cross would all be identical, whereas the manygene cross would vary continuously across a spectrum. C. The progeny from the single-gene cross would have three phenotypes, whereas the progeny of the trait caused by many genes would vary continuously across a spectrum.
Diastolic pressure is
a. the lowest blood pressure in the aorta. b. the pressure measured when the left ventricle is contracted. c. the peak pressure in the aorta when the left ventricle contracts. d. the difference between the highest and lowest pressures. e. an average of high and low pressures.
You are maintaining a small population of fruit flies in the laboratory by transferring the flies to a new culture bottle after each generation. After several generations, you notice that the viability of the flies has decreased greatly
Recognizing that small population size is likely to be linked to decreased viability, the best way to reverse this trend is to _____. A) cross your flies with flies from another lab B) reduce the number of flies that you transfer at each generation C) transfer only the largest flies D) change the temperature at which you rear the flies