Identify whether the statement is true or false, and why. “each type of receptor protein is specific to a certain signal or type of signal.” a. true b. false, it should read “receptor proteins can receive signals from many types of signal molecules.” c. false, it should read “receptor proteins are only used in synapses to receive neurotransmitters.” d. false, it should read “receptor proteins are universal and can receive signals from any type of signal molecules.”

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.

Greenthe fossil record is the history of life recorded byhuman observationgod.climatologists.remains of the past.

How does the human body lever work?