Gene flow
a. has a homogenizing influence on a population.
b. speeds up the divergence of two populations.
c. increases the genetic variation between
populations.
d. is promoted by isolating mechanisms.
e. promotes inbreeding.
Answer: a
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Phenotypes:
A. can be subject to environmental conditions. B. only result from gene transcription. C. are invariant. D. result solely from the actions of a single gene. E. None of the answer options is correct.
Mitochondria arose from an endosymbiotic relationship between a eukaryotic cell and an aerobic bacteria. Which statement supports this theory?
a. Fossilized mitochondria are older than the oldest fossilized eukaryotes. b. Mitochondria can produce ATP outside of a eukaryotic cell. c. A mitochondrion has its own DNA in the form of a single circular chromosome, like bacteria. d. A mitochondrion has a only one outer membrane. e. A mitochondrion can survive indefinitely when removed from a eukaryotic cell.
What is the mammalian transcription factor that elicits a cascade of gene transcription and developmental events that ultimately produce male internal and external structures?
What will be an ideal response?
Cells viewed in darkfield microscopy appear similar to those stained with the negative stain
Indicate whether the statement is true or false