Answer;
D) Linnaeus primarily used physical characteristics.
Explanation;
-Carolus Linnaeus developed naming system that is still used today, called binomial nomenclature. He is known as the Father of Taxonomy, which is the system of classifying and naming organisms.
-Among is contribution is the development of a hierarchical system of classification of nature, which includes eight taxa: domain, kingdom, phylum, class, order, family, genus, and species.
-However, some of Carl Linnaeus's classifications of organisms were incorrect because Linnaeus primarily used physical characteristics.
They're a few ways someone could receive color blindness for one color blindness could be inherited from your parents, and two could also be caused by "abnormal photopigments" which is down in the cells/genes and if deflects will most likely cause color blindness.
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It is thought that life arose on earth around four billion years ago. The endosymbiotic theory states that some of the organelles in today's eukaryotic cells were once prokaryotic microbes.
As population and density and competition increase, the death rate goes along with the positive curve so death rate increases.