Both Charles Darwin and Alfred Russel Wallace were influenced by Thomas Malthus's writings on:
A) uniformitarianism. B) giraffe neck length.
C) genetics. D) population growth.
Answer: D
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Which of the following types of plants form symbioses with cyanobacteria (thus allowing them access to usable forms of nitrogen)? Select all correct choices
A. mosses B. aquatic ferns C. eudicots D. cycads
A sample suspected of containing Legionella pneumophila is treated with the dye fluorescein isothiocyanate (FITC); however, the sample fluoresced a bright apple-green colony after it was processed. Which of the following statements explains this discrepancy?
a. A technical error may have occurred. b. The fluorescent bulb may have malfunc-tioned. c. The results are accurate; no discrepancy is found. d. A postanalytical error is to blame.
What is responsible for the selective permeability of a cell membrane?
a. the position of cholesterol in the membrane bilayer b. the integral proteins of the membrane c. the hydrophobic core formed by the phospholipid tails d. the hydrophilic end facing the cell exterior
Using fertility awareness as a means of birth control requires a detailed understanding of the female reproductive cycle. Given what you know about the cycle, when exactly should a woman avoid sex to prevent pregnancy if she is relying on fertility
awareness? Make sure to explain your answer. What are the challenges to this method of birth control? What will be an ideal response?