<span>A. Mammals use a closed, double-loop circulatory system aided by a four-chambered hearts.
The four chambered heart of a mammal is divided into two atria and two ventricles. Double-loop circulatory system is used. One loop for oxygenated blood, the other loop for deoxygenated blood.</span>
Answer:
cellular respiration
Explanation:
Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert chemical energy from oxygen molecules or nutrients into adenosine triphosphate (ATP), and then release waste products
General term: Behavior
Specific to plants: phototropism (leaves growing towards the sun), hydrotropism (roots growing to or away from moisture), geotropism (plants growing towards the center of the earth)
Answer:
peptide hormone
Explanation:
Peptide hormones is a molecule that contains four amino acids linked together. These hormones are proteins that have endocrine (hormonal) functions. Some create metabolic performance improvements through communication with the body to trigger the release of growth hormone into the blood. When this occurs the benefit shows in our ability to quickly build muscle mass and release stored fat.
Unlike New World monkeys, hominines Have opposable thumbs