Which of these substances would a soil layer close to the surface least likely contain?

A. sand

B. humus

C. bedrock

D. rock fragments

What happens to an enzyme after it catalyzes a chemical reaction?

Cancer, diabetes, mental illnesses, and other diseases not spread from person to person via germs are called diseases.

If you wanted to demonstrate a first class lever system to your peers which Childhood toy would you use as a basis for your demonstration and which body motion would you use as an example? A. A yo-yo and handshake B. A see-saw, chin raise C.

What happens when a sodium atom loses an electron in its outer energy O A. It becomes a negative ion O B. It has an increase in the number of protons. O C. It has an increase in the number of neutrons. O Dit becomes a positive ion.

What is the amount of displacement of a ball

Which example is an organism? A. bacteria B. heart C. clay D. soil

What are some examples of a chemical reaction?

If you continue to increase the intensity of light that a plant receives, what happens? A. The rate of photosynthesis increases indefinitely with light intensity. B. The rate of photosynthesis decreases indefinitely with light intensity. C.

Three structural changes that occur in young unmodified plant cells as they develop into xylem tissues

Which of the following statements about Polymerase Chain Reactions is wrong? (A) DNA is briefly heated to break the hydrogen bonds holding two strands together.