Answer:
Viriods are the sub-virals which is the smallest agent of infectious disease. While Virus infects the plants and animals, viriod affects the plants only. Common Cold Virus, Influenza virus etc are some of the example of virus. Potato Spindle tuber Viroid is an example of Viroid. The Genome of virus is DNA and RNA but Viroid is consist of RNA only.
Explanation:
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DNA is found in all living cells and in once living cells.
Answer:
so that the food chain won break and we all don die
:)
Explanation:
Good coronary circulation nourishes the heart and reduces the risk of a heart attack. Coronary arteries supply blood to the myocardium and other components of the heart. They originate from the left side of the heart at the base of the aorta. The heart muscles needs oxygen-rich blood to be able to carry out its functions.
Answer:
Atmospheric oxygen is too reactive
Explanation:
