The engulfment of food particles by a heterotrophic protist cell is
What will be an ideal response?
phagocytosis.
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Peristalsis is:
A. waves of muscular contractions that move food through the digestive system. B. a band of muscle that opens to allow small amounts of digested food to enter the small intestine. C. the mechanical breakdown of food in the stomach. D. the chemical breakdown of proteins. E. the formation of an ulcer in the stomach.
Based on the colligative properties of water, what would happen if one were to add a solute to water?
A. The freezing point of water would decrease. B. The freezing point of water would increase. C. The boiling point of water would increase. D. Both the freezing point of water would decrease and the boiling point of water would increase. E. Nothing would change with respect to the freezing point or boiling point of water.
Which project would be conducted by an ecologist?
A) a research project testing new pollution filters for cars B) a study of squirrels and their interactions with other animals C) observations of toad embryos' development in a Petri dish D) a project to genetically modify a wheat plant in order to increase production
Which organisms obtain energy by oxidizing organic or inorganic substances?
a. auxotrophs b. autotrophs c. chemotrophs d. phototrophs