Which example below will most likely guarantee that two closely related species will remain distinct biological species?
A) colonization of new habitats
B) convergent evolution
C) hybridization
D) geographic isolation from one another
E) reproductive isolation from one another
Answer: E) reproductive isolation from one another
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Based on the following classification scheme, which two organisms are most closely phylogenetically related? Why?
What will be an ideal response?
Phagocytosis is a process that cells primarily use to obtain nutrients.
a. true b. false
Proteins that do not align with known amino acid sequences fall into two classes: (1) (conserved hypothetical, unknown function, mystery, non-critical) proteins are encoded by genes that have matches in the database but no function has yet been assigned to any of the sequences; (2) Proteins of (conserved hypothetical, unknown function, mystery, non-critical) function are the products of genes unique to that organism.
A. conserved hypothetical B. unknown function C. non-critical D. mystery
Hypothesis I: A flavin pigment absorbs blue light; this pigment then activates the proton pump.Hypothesis II: When CO2 concentration rises, a membrane receptor inactivates the proton pump.Which hypothesis is supported by the fact that stomata open when exposed to white light, a mixture of all colors of light?
A. Supports both hypothesis I and II. B. Supports only hypothesis I. C. Supports only hypothesis II. D. Supports neither hypothesis.