Answer: Carbon monoxide
Explanation:
Carbon monoxide is a gas that is tasteless, colorless, and odorless, that is formed when wood, charcoal, gasoline is burnt.
When breathed in, carbon monoxide is harmful as it displaces the oxygen that is in the blood and this leads to the deprivation of the brain and other vital parts of the body of the oxygen that's is required for daily functioning.
Exposure to carbon monoxide is most likely affected cell differentiation in the growing embryo. When the pregnant woman inhales smoke, this affects the oxygen in the baby's bloodstream as it's being replaced by carbon monoxide and there's shortage of oxygen.
This affects the cell differentiation in the growing embryo and can lead to the child been born prematurely and can also lead to severe asthma like symptoms.
Correct answer: A) The eradication of childhood illnesses
Stem cell are the type of biological cells that have the ability to differentiate into other cell type and can divide to produce different types of cells in the body. They are called regenerative cell which renew itself, they are found in multi-cellular organism.
It can be used as a renewable source of cell replacement and tissue, it can treat serious and common type of disease without organ surgeries and transplantation. It can treat spinal injury, heart disease, diabetes, stroke and osteoarthritis. It has been successfully used in bone marrow transplantation.
Hence, the correct answer would be the eradication of childhood illnesses
Every year the farmer was taking care of his ice field, keep it clean and clear of all the unnecessary shrubs and then reuse the debris to fertile the soil again and then grow rice again. But since he fell sick, there is no one to take care of his rice field which will leads to the growth of unnecessary plants and weeds in it.
There will grow wild plants and shrubs which will contaminate the rice field.
A food web demonstrates which organisms transfer energy to other organisms. It helps maintain the ecosystem because if one life form went extinct, it could destroy the whole web.
