1). Mammals carry hemoglobin and oxygen in their red blood cells to help the blood circulate in the different parts of their body. State some reasons for these adaptations.

2). Human skeletal muscles consist of two types - the slow-twitch and fast-twitch skeletal muscles. The slow-twitch contains many mitochondria and hemoglobin content, whereas the fast-twitch skeletal muscles contains few mitochondria and hemoglobin content. State some reasons why humans and other mammals can adapt to different situations through the use of their skeletal muscles.

In mammals, oxygen is carried through the red blood cells called hemoglobin. The reason is that the oxygen is very important for the cell for releasing energy. This energy is used by the cell in different processes.

2) These adaptations are adapted by the organisms in order to perform different functions. In slow twitch skeletal muscles having high number of mitochondria because it requires more energy while fast twitch skeletal muscles contains less amount of mitochondria due to low requirements of energy. These characteristics are adapted according to the performance of the body parts.

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