Answer: B. Speed up the chemical reaction
Explanation: Enzymes help speed up chemical reactions in the human body. They bind to molecules and alter them in specific ways. They are essential for respiration, digesting food, muscle and nerve function, among thousands of other roles.
If a set of data is highly precise, it generally "indicates that the data must have a high level of accuracy" although there can be other crucial factors affecting the data as well.
An ectotherm gets its heat from external sources
(Remember "ecto" means outer, "endo" means inner)
The 30 million years ago, because its the closest one to us. Wait is there a picture to it ?