Answered: Which of the following is a…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

Which of the following is a synapomorphy for mammals?

a)Lactation

b)Limbs

c)Circulatory system

d)Amniotic egg

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Evolution is defined as a slow gradual change over a period of time. It brings about the deviation of species. Organic evolution is a slow, gradual, and continuous change due to which complex organisms are formed today from simple pre-existing forms. There are various theories proposed for the process of evolution. It is necessary to classify the organisms into various groups based on some characteristics. There are various methods for the classification of organisms. The organisms are classified on the basis of shared traits in a system called cladistics. If a trait exists in two organisms and is present in their common ancestor it is called a clade.

Synapomorphy- A shared character between the ancestor and its descendants is called synapomorphy. All the mammals share a characteristic of producing milk which is an example of synapomorphy

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