What scenario is an example of a physical change? A. Wood is burned in a campfire and is turned into ash
B. a piece of metal is left in the rain and form dust
C. Lead is melted into liquid to form dust
D. Yeast turns sugar into energy, water, and carbon dioxide

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.

Surrounded by microtubules, located near the nucleus. (don't try to google it) (give answer only if u know)

Which entry is in the wrong position in the table?