Pls answer this 15 question
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Answers
Organisms differ in their form, structure and mode of living. Hence, based on their similarities they should be grouped. The grouping of related organisms helps us in studying their evolutionary relationships. Classification is the division of organisms on the basis of characteristics into groups and sub-groups. A characteristic may be a particular form or function. For example, classification of animals can be done based on some criteria. Criteria for classification: Animals are classified on the basis of different features. *Cellular or tissue level of body organisation. *Body symmetry. *Type of body cavity called as coelom. *Presence or absence of segmentation. *Presence or absence of a backbone. Evolution: It is the sequence of gradual changes over millions of years in which new species are produced. Classification of species is done by knowing the characteristics which evolved over a long period of time.
Answer
→ Evolution is the process by which newer types of organisms are developed from the pre-existing ones through modification. Classification is the arrangement of organisms into a series of groups based on physiological, biological, anatomical or other relationships. All systems of classification are hierarchical.
The more closely two species are related, the more likely they will have had a common ancestor, eg. a brother and a sister are closely related and have common ancestors in the first generation before them, namely their parents.
A girl and her first cousin are also related, but less than the girl and her brother. This is because cousins have common ancestors, their grandparents, in the second generation before them, not in the first one. Thus, classification of organisms in fact a reflection of their evolutionary relationship or we can say that evolution and classification are interlinked.