Which of the following is true regarding sympatric speciation?
A. Sympatric speciation requires physical
separation of two populations.
B. Sympatric speciation requires a selective
disadvantage of hybrids (e.g., medium-billed
birds) of two diverging populations.
B
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A Punnett square is used to determine
(a) probable gamete genotypes. (b) possible parental phenotypes. (c) possible parental genotypes. (d) possible genetic outcomes of a cross.
The binding of a neurotransmitter to ligand-gated K+ channels will cause ____ in the postsynaptic
membrane.
a. depolarization b. hyperpolarization c. repolarization d. apolarization e. depolarization and repolarization
In DNA, the substitution of a purine for a pyrimidine or a pyrimidine for a purine is called a(n) ________
A) inversion B) transmutation C) transversion D) transition E) substitution
What term describes localized tumor growth?
a. metastasis b. carcinoma in situ c. pleomorphic d. anaplastic e. sarcoma