Chapter 41, Problem 13TYK

Summary Introduction

To review:

The reason due to which only 3% of the somatosensory cortex is responsible for hearing while 30% of the sensory cortex is responsible for vision, based on natural selection.

Introduction:

The sense organs are not just present in vertebrates but are also present in different forms in invertebrates and single-celled organisms as well. The single-celled organisms are able to detect a chemical change in water. Invertebrates have very simple types of receptors that help them detect any change in their environment so that they could move to a safe harbor. The visual receptors and auditory receptors have evolved over the course of time. It has been speculated that eyes were the first sense organ that developed in living organisms.