Organisms have gradually adapted certain structures that help them succeed in their environments. What internal structure have birds developed that helps them successfully fulfill their niche? oil glands for flight endurance
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hollow bones to reduce mass for flight
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pointed beaks to increase chances of attracting a mate
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webbed feet for landing on tree limb

In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal responds by in order to its core temperature?

With regard to enzymes, key is to lock as a) substrate is to activation energy eliminate b) product is to substrate. c) enzyme is to active site. d) substrate is to active site.