Disease-causing agents are called pathogens. It is the broadest term that can be used which refers to any bacterium, viruses or any microorganism that causes disease. It is also known as infectious agent. It can also be defined as an agent that disrupts the normal function of a multicellular animal or plant.
Answer:
c) nucleus
Explanation:
Monera is a kingdom that contains unicellular organisms with a prokaryotic cell organization (having no nuclear membrane), such as bacteria
Answer:
The correct answer is genetic drift.
Explanation:
The phenomenon of changing the frequency of an allele in a specific population with time is known as genetic drift. The mentioned gene variation or the modification in the frequency of the allele is required to take place abruptly so that the phenomenon of genetic drift can take place. The environmental factors do not play an essential role in the phenomenon of genetic drift to take place.
The process of genetic drift occurs generally due to random sampling of organisms, it illustrates the random change in the number of gene variants within a population. When the existence of the different forms of a gene, that is, alleles, enhances or reduces by chance with time within a population, the phenomenon of genetic drift occurs. Thus, the mentioned case is an illustration of genetic drift.
A hypothesis that has been verified by many scientists is called a scientific theory. Scientific theory can be derived from careful examination of facts and thorough testing and proving of the different scientists. A hypothesis is an intelligent guess about a certain situation or problem. Whenever this hypothesis would be verified many times by many scientists, this would be<span> under now the category of scientific theory.</span>
