How has the role of horizontal gene transfer (HGT) in evolution changed over time?
a. Early life-forms were fixed entities and the only way to adapt was through HGT. HGT no longer occurs.
b. Early life-forms had modular genomes for which HGT played a large role in adaptation. This role has decreased over time.
c. Early life-forms had modular genomes for which HGT played a large role in adaptation. This role has increased over time.
d. HGT was irrelevant for early life-forms. HGT is a more recent phenomenon and is important for current adaptations.
B
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The descending arm of the loop of Henle is permeable to ____ but impermeable to ____
a. water; potassium ions b. water; sodium ions c. sodium ions; water d. potassium ions; water e. all choices are incorrect
Mountains produce
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