Answer: c) the anticipated geographical spread of a disease based on past observances.
Explanation: Prevalence simply means the widespread of a thing or condition. In epidemiology, prevalence can be defined as the total number of people in a population that is affected by a medical condition or total number of cases of a disease in a population in a given period of time.
Expected prevalence of a disease is therefore the anticipated widespread of a disease or the anticipated total number of cases of a disease in a population based on past observed incidences.
Answer:D
Explanation: The answer is D because Archaebacteria are the only bacteria that defy the laws of nature and live in harsh/ tough environments.
D.
They have the same number of protons as electrons.
Explanation:
Protons are found in the nucleus of the atom and have a positive charge while electrons orbit around the nucleus and have a negative charge. Usually, in a neutral atom of an element, the number of protons is equal to the number of electrons. This is why the atom has no charge because the positive and negative charges cancel out. When an atom loses an electron its charge turns positive while when it gains an electron its charge turns negative.
