Which of the following describes a function of the endoplasmic reticulum within a cell? intracellular transport
lipid synthesis
protein modification
DNA storage

All eukaryotic cells contain small bodies called

Why do the circulatory systems of land vertebrates have separate circuits to the lungs and to the rest of the body?

Which of the following statements best distinguishes a hypothesis from a theory? a. theories are hypotheses that have been proved. b. hypotheses are guesses; theories are correct answers c. hypotheses usually are relatively narrow in scope; theories have broad explanatory power. d. theories are proved to be true; hypotheses are often contradicted by experimental results.