Which body system is responsible for breaking down food molecules so that they are small enough to be used by cells?

excretory system

endocrine system

digestive system

circulatory system

An experiment was set up to test the effects of different carbohydrates on fermentation of yeast. According to the experimental setup, what was the independent variable of the experiment?

Nancy weighs 124 pounds and is at an appropriate weight for her height. how much should nancy weigh at the end of her pregnancy

Which sentence best describes mass movement?

What is also called "swimmer's ear" A. otitis media B. otitis exterma C. otitis interna D. none of these options are correct

A structure that seems to serve no purpose in an organism is called: A. homologous B. vestigial C. dichotomous D. fossilized

Phosphatases are a family of enzymes that specifically remove phosphate groups from proteins that were added by protein kinases. Vanadate is an inhibitor of phosphatases in eukaryotic cells.

Thermoregulation, an important part of homeostasis, is defined as

What recent invention did carl woese use in 1970 to create his tree of life?

What sphere includes rocks and minerals

What is one feedback mechanism in the human body