BIOLOGY  -TEXT
BIOLOGY -TEXT
14th Edition
ISBN: 9781260710878
Author: Mader
Publisher: RENT MCG
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Chapter 30, Problem 1TC
Summary Introduction

To explain:

Whether the selection of trait that is both negative and positive.

Introduction:

Bipedalism is a trait shown by highly evolved groups of life forms. This evolution occurs recently in the evolutionary history and is consistent with other highly evolved traits and it gives the animals many advantages. It requires changes or modification in anatomical structure which have some disadvantages too.

Expert Solution & Answer
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Explanation of Solution

Bipedalism has many advantages and disadvantages. One such advantage is that it makes an individual efficient in carrying food and run long distances. Eventually, freed hands enable the organism to create and use tools. However, this feature would require a large brain which happened millions of years ago after bipedalism.

Disadvantages of bipedalism are: bipeds are easily located by predators; they have a risk of back injuries, including slipped discs, and arthritis. As walking upright lifting heavy objects and carrying heavy items put a substantial strain on the lower back, sometimes the strain is so high that legs break down and blood pools, causing the veins to bulge. Thus, the individual becomes unable to move.

Conclusion

In this way, an individual can identify the negative and positive of a trait.

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