<span>During digestion, the blood picks up nutrients absorbed through the gi tract and transports them to the <u>different organ systems of the body.</u> The oxygen and nutrient-rich blood can be transported throughout the body by the different blood vessels that surround it. Without blood circulating through the body, it would be hard for the body to maintain its homeostasis and survive for long.</span>
The number of green bodied insect would probably increase in the grass habitat. The insects that are green would be harder to spot by predators and therefore more likely to survive and produce offspring. The process of natural selection would favor the green color of the body and the future generations will have an increase in numbers of green bodied individuals over the tan bodied individuals.
Here something that might help
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Most scientists believe that for half of </span>Earth's<span> 4.6-billion-year history, the</span>atmosphere<span> contained almost no </span>oxygen<span>. Cyanobacteria or blue-green algae became the first microbes to produce </span>oxygen<span> by photosynthesis, perhaps as long ago as 3.5 billion years ago and certainly by 2.7 billion years ago.</span>
The chemical process by which complex molecules of protein are made from simple molecules is called Respiration
