A molecule is two or more atoms bonded together. A hydrogen gas molecule (H2) is two hydrogen atoms bonded together. Gina is building a model of a hydrogen molecule with balls and sticks. Which of these is the best model for her to build?

How do enzymes speed up biochemical reactions? A. They provide energy to the reactants. B. They absorb energy from the products. C. They lower the activation energy of the reactions. D. They increase the number of avaible reactant particles.

Which organ is the "superstar" of your digestive system?

Choose the best definition for this term. specific heat

Why is it important to test only one variables during an experiment?

The force of gravity on different planets

What does ventral mean

What is one way volcanic eruptions can affect climate

Which organ cleans the blood? liver heart gallbladder pancreas

How do prokaryotes and eukaryotes differ and how are they alike?

What fraction of this cross will be recessive for both traits?