The organ with the most acidic contents in the digestive system is the

a. pancreas

c. stomach

b. mouth

d. small intestine

Which statement describes an element? Check all that apply. An element is a pure substance that cannot be broken down into a simpler form. An element is made of two or more atoms that are chemically combined.

Read the following passage: Molten rocks deep inside Earth cool and form Rock A. The shifting of tectonic plates exposes these rocks. Wind and water break Rock A into small pieces.

What are two characteristics that animals classified as vertebrates might share? What are two characteristics that invertebrates might share?

All vertebrate embryos have a notochord, or a long rod that runs through the body just below the nerve cord. As the embryo develops, only jawless fish retain the notochord. What does this indicate about the evolution of vertebrates?

You have just delivered a baby boy. His body is pink, but his hands and feet are blue. His heart rate is approximately 110 beats/min and his respirations are rapid and irregular.

What is the chemical in leaves that absorbs light?

If a DNA double helix strand contains 3.6 billion based total, and there are 0.8 billion adenine bases contained in that strand, how many cytosine bases are there?

Compare/contrast under nutrition to malnutrition

Explain how having nerve cells clustered around the edge of its bell is advantageous to a medusa

Mutations are rare and occur because of? -An error in DNA replication -natural event such as an earthquake -Migration of organisms to a new population