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

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.

What would most likely happen if green plants were exposed to longer days of sunlight? a. the mitochondria would produce less energy . b. the chloroplasts would produce more energy. c. the cell wall would become thicker. d. the vacuoles would quickly shrink. b. the chloroplasts would produce more energy.