Taxonomy, or taxonomy, is originally derived from the need for scientific classification of species. It now extends to other sciences, including human sciences, information sciences and computer science. Sometimes we call it "taxonomy" to describe the result of a taxonomic activity, that is to say a classification.
The traditional classification is based on a fixed hierarchy of categories (taxon ranks), defined as follows:
Reign (or Kingdom) (there are currently six) → Division (or phylum) → class → order → family → gender → species.
The volume of the cube of unknown substance is 
. The length of one side of the cube is 9 cm
<u>Explanation:</u>
As per the formula of mass and density, Mass / Density equals to volume. Therefore as the mass of the cube was given to be 81 g and the density of the cube is known to be 3.0 g/
,, to help Bill find out the volume. It is the ratio of mass and density and can be calculated as
As it is a cube, the volume is product of length, breadth, and height. Here, all sides are same as it is the cube.
Photoreceptor proteins are light-sensitive proteins involved in the sensing and response to light in a variety of organisms. Some examples are rhodopsin in the photoreceptor cells of the vertebrate retina,phytochrome in plants, and bacteriorhodopsin<span> and bacteriophytochromes in some bacteria.
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B. Clade 1 is ancestral to all the other clades
