Kevin is taking a meteorology class in which he studies weather and climate. He learns that Earth's position relative to the sun determines the seasons. For example, more sun shines on the Northern Hemisphere in July than in December. Why does the sun shine more directly on Earth’s Northern Hemisphere during the summer months?

the scientific method.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products

you should wear a lead protective shield when having teeth x-rays

hope i

-lavira : )