Answer:
The scientist is studying oxygen which can also be found in protien. oxygen is the element which makes up to 65% of human body mass. It is also found in proteins inside the body.
Answer:
The human body needs a list of macromolecules and micromolecules for performing day to day functions.
The essential macronutrients that the body requires are:
Carbohydrates: Carbohydrates are required by the cells in the body to carry out normal day to day functions. Energy is provided in the form of calories by the carbohydrates.
Proteins: Proteins are essential nutrients which are required for growth as well as better functioning of the immune cells of the body.
Fats and oils: These are needed for providing insulation to the body and to store energy.
Fibres: These are a mixture of carbohydrates.
Water: Almost every activity of the body requires water.
The essential micronutrients that the body requires are:
Vitamins: Vitamins are a group of substances which are needed by the body to function normally.
Minerals: Mineral are needed to ensure that tissues are working correctly.
The two biggest reasons for children spending less time outside are the development of technology and the safety issues. The development of technology brought in our homes countless forms of having fun which is very important to children. The mobile phones, PC's, laptop's, tablets, Sony Play Station, as well as lots of technologically improved toys, made the children stay at home since they have the fun indoors, and not be interested in going outside and in nature. Also the safety issues in lots of parts in the world made the parents to restrict the children to the indoors environment.
The answer to the question is D
