Which of the following might be expected in the logistic model of population growth?
A) As N approaches K, b increases.
B) As N approaches K, r increases.
C) As N approaches K, d increases.
D) Both A and B are true.
E) Both B and C are true
Ans: C) As N approaches K, d increases.
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Which one of the following is the eye structure found in flatworms that senses the direction and intensity of light?
A. eyecups B. compound eyes C. single-lens eyes D. ommatidia
Each amino acid is encoded by only one mRNA codon
a. True b. False
Which of the following steps in normal cellular respiration ends with formation of water?
A) glycolysis B) citric acid cycle C) electron transport D) fermentation
Suppose that Joe Scientist fuses a mouse cell and a human cell, and then treats the cell with specific antibodies covalently linked to fluorescent dyes (antibodies linked to mouse proteins are green; antibodies linked to human proteins are red). Forty minutes later, Joe Scientist looks at the fused cell. What will Joe Scientist observe?
a. The red and green labels will be distributed in intermingled patches. b. The red and green fluorescent labels will be uniformly distributed across the entire membrane. c. The red and green labels will flash intermittently. d. The cell will be half red and half green.