What distinguishes a hypothesis from a theory? A. A theory is a scientific explanation. B. A theory is testable. C. A theory explains a natural phenomenon. D. A theory is backed up by repeated observations and tests.

Earth's dynamic processes allow our planet to recycle: A) water, rock and air B) water, rock and surface materials C) rock, air and surface materials D) air, surface materials and water

What are the general roles of carbohydrates

5. How are organisms placed into groups?

There are two types of cell division. The first (A) produces cells that are identical to the original cell. The second (B) produces cells that are different from the original cell.

g What basic characteristics do we generally expect to find in all things that qualify as being alive? Question 1 options: 1) an ability to: reason, make polymers and repair damage. 2) an ability to: reproduce, respond to stimuli and repair damage.

If a molecule is too large to slip through the spaces in the membrane, how will that molecule enter the cell? A. The molecule will shrink so that it can fit in the spaces. B. The molecule will move through a protein channel. C.

Consider the cell cycle; which stage takes pretty much the same amount of time regardless of cell type? Explain

Which of the following best describes the result of meiosis II

What is the principal male sex hormone

Animal species of the tropical rain forest Select one: have adaptations to cope with extreme variations in climate. have adaptations that minimize competition. compete more for available resources than species native to other biomes do.