Which of the following outcomes is more likely to occur in an organism undergoing sexual reproduction than in an organism undergoing asexual reproduction?
a. a rapid increase in population size
b. a decrease in genetic diversity
c. an increase in genetic diversity
d. a rapid colonization of new niches
Ans: c. an increase in genetic diversity
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According to the modern synthesis, macroevolution results from ____
a. abrupt changes in a species environment b. the chance appearance of “hopeful monsters” c. changes in genes that occur in spurts d. abrupt changes in an individual’s genetic make-up e. the gradual accumulation of microevolutionary changes
What has been detected in meteorites that have fallen to the Earth?
a. organic compounds b. organic polymers c. evidence of cells with a nucleus d. fossilized proto-cells e. oxygen molecules
When is an unborn child called a fetus?
A. From the 9th week of pregnancy to birth B. From cleavage to the 9th week of pregnancy C. From cleavage to birth D. From conception through birth
Oxygen is mostly transported through the body in which of the following forms?
A) dissolved in the blood B) dissolved in red blood cells C) bound to hemoglobin D) bound to dissolved iron