A virus, because it has a non-cellular structure.
Explanation:
The production and release of thyroid hormones, thyroxine and triiodothyronine, is controlled by a feedback loop system that involves the hypothalamus in the brain and the pituitary and thyroid glands. ... This system allows the body to maintain a constant level of thyroid hormones in the body.
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Answer:
Blood is needed to keep us alive. It brings oxygen and nutrients to all the parts of the body so they can keep working. Blood carries carbon dioxide and other waste materials to the lungs, kidneys, and digestive system to be removed from the body. Blood also fights infections, and carries hormones around the body.
compounds and functional groups that contain a basic nitrogen atom with a lone pair
Answer:
The right option is; A)
Explanation:
The limb bones are similar across these species because they share a common ancestor BEST explains this common skeletal structure.
The three similar bone structures; humerus, ulna and radius that is found in the arm or forelimb of humans, horses, goats, and mice are known as homologous structures. These structures are found in different organisms and because of their similarity suggest that the organisms have evolved from a common ancestor. The structures are usually similar in form but they may not necessarily have the same function in the organisms.
