In the process of photosynthesis, plants use carbon dioxide (CO2), water (H20), and light energy to produce a sugar (C6H2O) and oxygen (O2). In the process of aerobic respiration, animals and
plants release energy
from sugar and oxygen and produce carbon dioxide and water. The chemical
equations that describe these reactions look like this
6CO2 + 6H2O + light → CH,206 +602
CH,206 +602 → 6CO2 + 6H2O + energy
+
How do these equations explain why the total amount of O, and Co, remains the same?

Which are forms of nitrogen that are usable by humans

Provide one reason why mitosis occurs.

Animal bodies (and even plant bodies for that matter) are complex enough that life couldn't exist without enzymes. enzymes are usually large, complex biological catalysts that are expensive to make. enzymes speed up the rate of chemical reactions without being used up during the reaction (they can be reused many times). they are highly specific in the reactions they regulate. knowing what enzymes are and how they function, why does this explain why complex life forms could not exist if there were no enzymes.