The amount of energy needed fo a reaction to take place is the activation energy. en zymes can lower the activation energy of a chemical reaction, which of the fallowing describes a way that process could happen?

Enzymes lower the activation energy by forming a complex with substrate (enzyme-substrate complex). There are a few mechanisms of enzymes activity:

•Enzymes can change the charge distribution of the molecule

•Enzymes can change the substrate bonds

•Enzymes can reduce the reaction entropy.

All of the mechanisms tend to bring the molecule (reactant) to unstable state called the transition state (high-energy state).

So the similarity of the planets and the dwarf planets are they are both mostly round because they have sufficient gravity to flatten their own surfaces into a sphere. The differences are that planets are big enough to clear the whole region of space where they orbit the sun whereas dwarf planets do not.