Fold your hands together so your thumbs cross over, and look at your thumbs. which thumb feels most ‘comfortable’ on top is actually controlled by a gene. the left thumb folding over the right thumb is a dominant trait, whereas the right thumb folding over the left thumb is a recessive trait. let’s call the dominant form of this gene “l,” and the recessive form “l.”

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.

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?