A controlled experiment must A. have a dependent variable. B. have an independent variable. C. be falsifiable. D. be repeatable. E. All of the above.

The pancreas produces enzymes that aid in digestion. By what process are these digestive enzymes excreted from pancreas cells? A. osmosis B. exocytosis C. endocytosis D. diffusion

Which of the following is not a way in which cells maintain homeostasis? A They take in water and release waste. B. They respond to stimuli in their environment. c. They allow water to build up within their membranes D.

There is only one tool used to heat equipment in the laboratory?

Which of the following are made up of cells? I need to know ALL of the ones, not just a few. drinking glass clam shell fern leaf cow tongue blueberries pancake batter wicker basket butter dill pickles cotton tshirt rubber gloves water

What term refers to organisms that look alike and produce fertile offspring?

Which structure type is not formed by polymers? A) crystalline B) 1-dimensional chain C) 2-dimensional sheet D) 3-dimensional framework

How does a birds sternum compare to yours? What is another name for it?

Why is it unlikely that the frequency of muscular dystrophy in the human population will be reduced quickly by means of natural selection?

Adaptations give organisms a better chance for

Sound waves cannot travel in a cacuum because?