<span>(4) active transport
</span>Active transport is the movement of molecules across a cell membrane in the direction against their concentration gradient, i.e. moving from an area of lower concentration to an area of higher concentration.
Answer:
Amphibians
Explanation:
They had just shown up during the Carboniferous period and were still living in the water.
The part of the enzyme molecule that binds to its associated substrate is ACTIVE SITE.
The active site contains the catalytic groups which are amino acids which promote the formation and the break down of bonds. By breaking and forming new bonds, the enzyme substrate interaction brings about the formation of the transition state.
<span>I think that inhalants are a delivery method and not necessarily a drug type. The other three listed are actual drug types and are used in physical and mental health prescriptions. Inhalants are typically non-prescription/illegal drugs.</span>
