The answer to your outstanding question is 3
The answer is pulmonary
artery. This is an artery in the circulation that holds the deoxygenated blood from the heart to the lungs<span>. The biggest
pulmonary artery is the pulmonary trunk from the heart and the smallest are
found next to the pulmonary alveoli<span>.</span></span>
Answer;
Carbohydrates;
The macromolecule that provides a person with most of the energy that is needed for daily activities is carbohydrates.
Explanation;
-Biological macromolecules fall into four categories: carbohydrates, proteins, lipids and nucleic acids. The body uses carbohydrates, lipids and proteins for energy.
Carbohydrates are the main source of energy and for structural purposes, Lipids are used to store energy; important parts of biological membranes and waterproof coverings, Nucleic acids helps to store and transmit hereditary or genetic information. Proteins functions as a source of energy and to control the rate of reactions and regulate cellular process.
the answer is natural selection
