What is the basis of Mendel's laws?
A) the behavior of chromosomes during prophase I of meiosis only
B) the behavior of chromosomes during mitotic anaphase
C) the behavior of chromosomes during prophase I and prophase II of meiosis
D) the behavior of chromosomes during metaphase I and anaphase I of meiosis
D
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Based on your knowledge of cost-benefit analysis, why would you expect some white-fronted bee-eaters to fly very far away from their nests to forage when there are food sources nearby?
A) There might be some plentiful food sources further away. B) Competition for food is too intense near the nest. C) Food near the nest is usually of lower quality. D) Predation is highest closest to the nest.
The binding of tryptophan to the Trp repressor protein results in:
A. the dissociation of the repressor from the operator sequence. B. a conformational change in the repressor that allows the repressor to bind the operator. C. the recruitment of RNA polymerase. D. an increase in the expression of tryptophan biosynthetic enzymes.
In the process of mRNA splicing, the lariat structure is the ____
a. splicing complex
b. region where two exons are pasted together c. enzyme that cuts the pre-mRNA d. released intron e. region where two introns are pasted together
Which portion of the renal tubule empties directly into the collecting duct?
a. Bowman's capsule b. distal convoluted tubule c. proximal convoluted tubule d. descending loop of Henle e. ascending loop of Henle