Answer:
Your nails are made of keratin. Keratin is a type of protein that forms the cells that make up the tissue in nails and other parts of your body.
Answer:
True
Explanation:
This statement is true. Medical researchers at Harvard and Stanford universities found that leading a sedentary lifestyle (sedentary meaning minimal exercise with little movement) leads to a higher risk of health complications (which can be more prevalent in older age).
This finding strongly recommends that middle-aged people should undertake some form of regular exercise so as to not fall into the category of "sedentary".
Answer:
The different classes of waste produced in a house can be classified as follow: organic waste, liquid waste, solid waste and recyclable waste
Explanation:
In family homes, it is important to understand which are the types of waste in order to know how to dispose of them properly in an environmentally friendly way. First, liquid waste from the bathroom and kitchen is usually directed to the main sewer line or eliminated by septic tanks that serve as sewage collectors. Second, organic and recyclable waste is biodegradable, thereby this type of waste is usually disposed of in incinerators or landfills. Third, solid non-hazardous waste can be eliminated by compressing with mechanical systems and covered with earth to be finally compacted.
Ctyoplasm:
The jelly like substance that surrounds a cell
Ribosomes can be found in the Cytoplasm, along with Cytoskeleton, Lysosomes, and in plant cells Cholorplasts.
Cytoskeleton:
This is the form of defense an animal cell has, since it lacks a cell wall unlike a plant cell animal cells have a Cytoskeleton.
Answer:
B. store excess carbon underground
Explanation:
The fossil fuels have been formed on the basis of organisms that have died, mostly producers. These organisms have carbon stored in them. As they died and got covered by sediments, the carbon has been stored in the lithosphere. Since more and more sediments have been covering the stored carbon, it has been isolated and stored into the lithosphere for tens or even hundreds of millions of years, thus contributing to lowering the amount of carbon in the atmosphere for quite some time, and removing it from its natural cycle.
