By consuming other organisms and organic matter
According to evolutionary theory ,natural selection is linked to reproductive fitness, which is present only in the earlier part of adulthood.
<h3>What is evolutionary theory of aging?</h3>
Evolutionary theory of aging is a theory that state the reason there is increase in mortality with age. As person grow older, less lifetime fertility remains, Therefore, continued survival lead to a reduced. reproductive fitness.
Therefore, According to evolutionary theory ,natural selection is linked to reproductive fitness, which is present only in the earlier part of adulthood.
Learn more about evolutionary theory below.
brainly.com/question/1909579
Answer:
<em>They deliver oxygen to the blood.</em>
Explanation:
The main function of the respiratory system is to provide oxygen to the body and to remove carbon dioxide from the body. Oxygen is transported to all ports of the body via blood vessels from the lungs. The alveolar sacs, present in the lungs, allow oxygen to be transported to the blood and carbon dioxide to be taken up.
The organs of the respiratory system include nose, pharynx, epiglottis, larynx, trachea, Bronchi, Bronchioles, alveolar sacs of the lungs.
