Biology, 20.03.2020 17:40, sparklegrace9726
Many songbirds breed in North America in the spring and summer, and then migrate to Central and South America in the fall. They spend the winter in these warmer areas where they feed and prepare for the spring migration north and another breeding season. Two hypothetical species of sparrow, A and B, overwinter together in mixed flocks in Costa Rica. In spring, species A goes to the east coast of North America, and species B goes to the west coast. What can you say about the isolating mechanisms of these two species?
Answers: 1
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All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time
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Biology, 22.06.2019 04:50, pineapplepizaaaaa
Describe the function of the endomembrane system? what organelles are involved?
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Many songbirds breed in North America in the spring and summer, and then migrate to Central and Sout...
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