You are a biologist on a trip to an island in the South Pacific. While there, you are allowed to collect DNA samples from a local species of tortoise that resembles a species seen on a nearby continent
If your DNA analysis also indicates the two species are highly related, you
might conclude that this was an example of _______________ through ________.
A. allopatric speciation; dispersal
B. allopatric speciation; vicariance
C. sympatric speciation; dispersal
D. sympatric speciation; vicariance
A
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________ refers to the function of a body part, while ________ refers to the structure of a body part.
A. Zoology; biology B. Physiology; anatomy C. Biology; zoology D. Anatomy; physiology
Zuzu is a white cat. She is genotype Ww for the "white masking gene" that reduces the number of melanocytes (pigment-containing cells). As a result, her body makes pigment, but it cannot get into the cells where it would color the fur. Zuzu's white masking gene is ________ to the melanin pigment gene because it prevents full expression of the pigment.
A) recessive B) pleiotropic C) epistatic D) dominant
How does aspirin help reduce blood clotting?
1.It reduces the red blood count. 2.It reduces platelet aggregation. 3.It reduces the platelet count. 4.It binds to fibrin. 5.It inhibits thrombin.
Eukaryotes have higher gene densities than prokaryotes.
a. true b. false