the sperm finds an egg and that egg equals a baby
Answer:
Macromolecules such as starches, proteins, and fats store great amount of energy (ATP) by making comlpex chemical bonding. This energy cannot be extracted unless they are digested (broken) first. Therefore, organisms with the help of enzymes break the big molecules to make them simpler compounds. Thereon, energy is extracted through series of chemcial reactions occuring within the animal body, i.e. glycolysis, electron transport chain, etc.
The correct answer is the cell membrane. It is responsible in controlling the exchange of material in and out of the cell. Hope this answer helps. Good luck!
