Which is NOT necessary for sympatric speciation?
a. organisms living together in the same location
b. a common home range
c. geographic barriers
d. existing interbreeding population
e. reproductively mature individuals
Answer: c
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The eight climographs below show yearly temperature (line graph and left vertical axis) and precipitation (bar graph and right vertical axis) averages for each month for some locations on Earth
Which climograph shows the climate for location 1? A) A B) C C) E D) G E) H
Supertasters for the chemical PTC are ____ for the trait
a. homozygous dominant b. heterozygous c. homozygous recessive d. either homozygous dominant or homozygous recessive e. either homozygous dominant or heterozygous
You suspect that your roommate may be abusing drugs. He exhibits the following symptoms: aggressiveness, bursts of extreme energy followed by "crash" periods, and delusions. Which drug may be responsible?
A) amphetamines B) LSD C) marijuana D) heroin
Which of the following organelles contains microtubules?
A. mitochondria B. cilia C. cell membrane D. ribosomes