Which represents a theory?

I observed three stars in the sky. The stars give off light.

Light travels at 300,000 kilometers per second. Stars are balls of hot gases.

All or none principle of skeletal muscle contraction states that

What is the process of reproduction where somatic cells are made

What are the two substances that maybe formed in anaerobic respiration

name 5 things that you, your community, or your country can do to reduce the amount of greenhouse gases you put into the atmosphere

Why does it rains sometimes and not others?

Passive transport is the act of a molecule moving freely down its concentration gradient. true or false

Identify and explain three major issues that cut across psychology

Which of the following is an unsegmented acoelomate worm? a. flatworm b. annelid c. roundworm d. echinoderm

Dog breeders maintain the purity of breeds by keeping dogs of different breeds apart when they are fertile. This kind of isolation is most similar to which of the following reproductive isolating mechanisms? A. mechanical isolation B.

From the time of my beginning, my part was made of fibrous material called collagen, which is secreted by