Which of the following is an example of a fixed action pattern behavior?

a cat using a litter box

a monkey washing a piece of food

a dog rolling over at the sight of a treat

a robin flying south for the winter

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.

Which food could be transported in a galvanized metal container?