Which of the following would a prokaryotic organism contain?
a. pili
b. nucleus
c. lysosome
d. smooth ER
a. pili
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Which outcome could help you identify a trait whose expression is determined by the effects of two or more genes (polygenic inheritance)?
A. A mating between a homozygous and a heterozygous individual produces more than the expected number of offspring expressing the dominant trait. B. The trait varies along a continuum in the population. C. All of the alleles of the gene for that trait are equally expressed. D. Pleiotropy occurs.
A sterile mule is produced by mating a horse and a donkey. this is an example of _______ reproductive isolation.
A. prezygotic B. allopatric C. sympatric D. outgroup E. postzygotic
Consider several human populations of equal size and net reproductive rate, but different in age structure. The population that is likely to grow the most during the next 30 years is the one with the greatest fraction of people in which age range?
A) 50 to 60 years B) 40 to 50 years C) 30 to 40 years D) 20 to 30 years E) 10 to 20 years
The placenta protects the developing fetus from harmful substances like alcohol or drugs.
Answer the following statement true (T) or false (F)