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Cards In This Set
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In polygynous mating systems:
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There is usually greater variation in reproductive success among males than among females.
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Among Natterjack toads in northern Europe, males produce booming calls to attract females. Females desire large males and the size of the male determines the volume of the call. Why is the Natterjack's call considered an “honest signal”?
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Because the call of a large Natterjack male cannot be faked by a smaller Natterjack male
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______________________ is an action or signal on the part of one organism that alters the behavior of another organism.
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Communication
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Molecules released by an individual into the environment that trigger behavioral responses in other individuals are called:
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Pheromones
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The more asymmetric the parental investment is between the sexes:
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The more radical we expect the sexual dimorphism to be, both physically and behaviorally.
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Monogamy, a relatively rare system outside of birds, evolves when:
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Both males and females have high and equal parental investment.
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The classic experiments performed in the 1950s by Harold Urey and Stanley Miller were the first to show that:
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Simple organic molecules, such as amino acids, could form spontaneously in the laboratory under chemical conditions mimicking those of primitive earth.
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The oldest prokaryotic fossils have been dated to:
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3.5 billion years ago.
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Interacting systems of molecules enclosed in compartments called __________ evolved 3.8 billion years ago in living organisms.
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Cells
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Researchers have found that mixtures of phospholipids placed in water or salt solutions tend to spontaneously form:
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Small spherical units that resemble living cells.
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The biological species concept:
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Defines a species as any group of actually or potentially interbreeding species that produce viable offspring
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Horses and donkeys can breed and produce sterile offspring known as mules. Horses and donkeys remain separate species because of this hybrid sterility, which is:
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A postzygotic barrier to reproduction
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Which of the following is NOT a prezygotic barrier to interbreeding between different species?
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Phylum, class, family, genus
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The morphological species concept:
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Groups species based on similar phenotype.
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Speciation without geographic isolation is called:
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Sympatric speciation.
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