What role do sex cells play in the well-being of a human?

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.

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.

What is any method of measuring the age of an object or event in years, such as using atomic half-life?