Answer : Fossil fuels are cheaper than alternative forms of energy.
Explanation : Fossil fuels are considered to be the rich sources from fossils which were crushed down under the layers of rocks millions of years ago. It is assumed that in certain areas of the world where the decomposition of millions of organisms occurred very long ago. It is found to be simpler in some ways to collect and is distributed widely. This was the argument that fits best to the conversation between the group of environmentalists who were discussing between the benefits and drawbacks which are associated with using fossil fuels.
All the above is correct.
I just learned this in science a month ago! Redi used a piece of meat in a jar and covered it with a cheesecloth. He got another jar of meat and left it open. He wanted to see if magots developed from flies or not. Luis Pasteur used an 'S' tube thingy and put broth inside and boiled it. Then he waited to see if broth fogged up because of dust or microorganisms. One tube was pointed upward so dust could get inside, and the other, downward. Hope this kindof explains this topic to you!
Answer: <u>Hemoglobin
</u>
Red blood cells contain a pigment, hemoglobin, which is responsible for the red color. It contains iron element, which gives it red color. Hemoglobin is responsible for the uptake of oxygen from the lungs and exchange with carbon dioxide in the blood. Hb is the oxygen carrier of the cell.
