Most osmophiles are prokaryotes.
A) True
B) False
B) False
Feedback: Most osmophiles are yeasts which are eukaryotic organisms.
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You observe variation in the auditory signal that males use to attract females. Which of the following would be true if the signal is an accurate indicator of male quality?
a. The highest-quality males have the most common form of the signal. b. The highest-quality males have the most extreme form of the signal. c. Male quality is unrelated to signal variation. d. Only the highest-quality females prefer the highest-quality males. e. Females will use multiple signals to identify the highest-quality males.
Darwin's theory was strongly founded on the geographic distances traveled by migrating species, or occupied by their populations. A theory of "island biogeography" was introduced in 1967, further elaborating on importance of the distances traveled, or areas occupied by populations. A specialized field of "landscape ecology" concerns patches of habitat, and distances between them, along with movement corridors, or barriers to movement. With all of these, the individuals that move about and successfully reproduce in the population
A. can be aided by human construction of artificial corridors of movement, such as railways and roadways. B. can be blocked by human construction of cities, or modification of vast landscapes for agriculture. C. demonstrate gene flow that can counteract trends in selection and other allele frequency changes. D. can reunite smaller groups of the species population that were previously isolated. E. All of the answer choices are correct.
If the inner lining of the air sacs is neither thin nor highly vascularized, then what can be inferred about the air sacs?
A) They must not belong to the respiratory system. B) They cannot be derived from endoderm. C) They are not efficient sites of gas exchange between air and blood. D) They cannot effectively moisturize the air before it reaches the lungs.
Which of the following is a case of altruism?
A. A plant releases allelopathic chemicals, harming its competitors and itself. B. A prairie dog gives up a foraging opportunity to keep watch for predators. C. A shrimp digs a burrow that it shares with a goby that keeps watch for predators. D. A baby bird aggressively begs, resulting in less food available to its siblings. E. Individuals in a flock of birds are less susceptible to predators than individuals alone.