What is one reason some leaves are spiny, or needle-shaped? A. to increase the rate of formation of food in leaves B. to reduce water loss from leaves in dry climate C. to store food in dry climates?

If you want to get very high concentrations of cocaine to the brain very rapidly, which route of administration would you probably use?

Which of these accurately describes a scientific theory? Select one: A. Theories are statements that describe some aspect of the universe. B. Theories are broad explanations based on many observations and experimer C.

The cell membrane is often referred to as a " ... "? because of the two layers of phospholipids.

Which is the smallest taxonomic group that contains organisms of different species

2. What is a carrier?

During which phase of mitosis do the chromatids become chromosomes? a. telophase. b. anaphase. c. prophase. d. metaphase

How did the development of the hela cell line affect society?

The human body is composed of cells, organs, organ system and tissues. How are these organized

Why might it be particularly beneficial for the giant spider crab to be so large?

In which stage of growth do plants rest or grow very little?