Answer:
8. Chloroplast.. Bcoz they have ti perform photosynthesis.
9. CO2.. Bcoz by reducing co2.. Plants make their food.
10. O2..
Accounting unit of ecological protection
Answer: Contractility
Explanation:
The ability of muscle to shorten forcibly when adequately stimulated is known as <u>contractility</u>, and sets muscle apart from other tissue types.
The answer is the atoms of the reactants have combined to form a new substance. Every product of a chemical equation has to be a new substance. If their is no new substance then, a chemical change never occurred and there is no chemical equation. The new substance never has the same properties as the reactants. That's why they call it a "new" substance. Also, the atoms are the ones that combine. They are not mixed