What is the primary source for new, unique genes in a population?

A) mutation
B) natural selection
C) artificial selection
D) crossing over


A

Biology & Microbiology

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Which are important factors that affect population sizes?

a. Generation timing b. Immigration of organisms c. All of these choices d. Mortality rate

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Heterochromatin does not exist in interphase nuclei

a. true b. false

Biology & Microbiology

________ are used for cutting DNA molecules into fragments

A) Antisense RNAs B) Mutagens C) DNA polymerase and DNA ligase D) Restriction enzymes E) RNA polymerases

Biology & Microbiology

Chronic granulomatous disease is a disorder of the (first/second/third) line of immune defense

What will be an ideal response?

Biology & Microbiology