Unlike external stimuli, internal stimuli: a. do not have multiple sources. b. cannot be satisfied through purchases. c. include stimuli such as hunger and thirst. d. include stimuli such as advertisements and videos.

Awic dietitian is meeting with a client who has an infant and a young child. the mother says that the young child is a very picky eater and will only eat crackers and juice. the health worker notices that the child's hair is brittle, his nails tear easily, and the skin inside his lower eyelids is very pale. these are all signs of iron deficiency.

The rate at which molecules water and oxygen can enter a cell is determined by the-

Assume that a student is given two different models of bacteria, with one model consisting of big bacteria and the other consisting of small bacteria. how can the student demonstate the theory of endosymbiosis using the models