In order to make sure that the test results of the variables are true or that you did not make a mistake in the experiment.
Evaporated water goes into the clouds, comes down as rain, and evaporates again
Many rickettsia are PATHOGENS.
Pathogens are micro organism that cause diseases and rickettsia are majorly disease causing organisms. They are rod shaped bacteria and most species are gram negative. They are natural parasite of some arthropods and they cause diseases in both humans and animals.
Explanation:
In population genetics, the term evolution is defined as a change in the frequency of an allele in a population. ... The allele frequency within a given population can change depending on environmental factors; therefore, certain alleles become more widespread than others during the process of natural selection.
determined by genetic factors and therefore able to be passed on from parents to their offspring or descendants.
