7. All the members of a species that live in an area make up 1an ecosystem
2a population
3a habitat
4an environment

2 a population

Explanation:

ecosystem is many types of species

population is 1 type of species

habitiat is similar to ecosystem

environemt is also similar to an ecosystem

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times