Which of the following is a compound?

A. Cl2

B. H2O

C. He

D. H2

Which label should Megan add to complete her chart?

Alkali metals react violently with water to form metal ions, hydroxide ions, and

A solution with the indicator would turn from yellow to blue when which combination of factors exists?

Where would you start when describing the blood flow through the circulatory system? (mainly the heart) I need to know because I'm writing a paper about the blood flow of the circulatory system from the perspective of a red blood cell.

What are cells made of

Where is the neutron located in the atom?

The first step a biologist takes when deciding how to study like is to

The simplest structures that can carry out all of the activities characteristic of life are:

How is an allele described? form of a gene one haploid cell part of a chromosome short segment of DNA

Because cell membranes are selectively permeable they are capable of interacting with the outside environment. This interaction enables the cell to