Which of the following best describes the nitrogen cycle?
cycling of nitrogen and oxygen that contributes 78% of atmospheric gases and drives food webs
cycling of nitrogen and oxygen that involves changes between the solid, liquid, and gas phases
cycling of nitrogen that contributes 78% of atmospheric gases and drives food webs
cycling of nitrogen that involves changes between the solid, liquid, and gas phases

Match the type of adaptation to the correct example, structural adaptation functional adaptation behavioral adaptation example type of adaptation elephants live in herds to protect their young leaves of a rain forest plant species have a pointed tip that enables rainwater to drain off easily. camels have nostrils that they can close snakes produce venom to kill prey and defend themselves. earthworms coil when touched, as part of a defense mechanism. human skin darkens with increased exposure to sunlight.

Look at the photo of the leaf. which term best describes this leaf?

Match with o for organic and i for inorganic for each compound