Cyanobacteria or simply known as blue-green algae may have formed the oxygen into the early atmosphere. This is because these micro-organism has the capability to photosynthesize wherein they can produce oxygen and carbohydrates. In fact, all the plants contribute in the fomation of oxygen.
Answer:
Photosynthesis
Explanation:
Breaking down sugar, locomotion, copying its own DNA, allowing certain substances to pass through the cell membrane while keeping others out.
Answer:
<h2>The Cornea in the ear</h2>
Explanation:
is the parts of the human body that get oxygen directly from the air and not from the blood
Shivering
Explanation: shivering action is an act to warm a homoeothermic body. Sweating makes the body cool, panting don’t keep body warm and dilating blood vessels does not keep body warm instead constriction of blood vessels is the initial process to conserve body heat followed by waves of muscle contraction, which is nothing but shivering. Alteration of the set point in torpor is also not the right answer
