Chapter 25, Problem 21A

Summary Introduction

To fill:

The given blank with the correct term.

Introduction:

The tongue is a muscular flap like structure that has a major role in taste and movement of food inside the oral cavity. The algae are small photosynthetic organism, found in the aquatic ecological system.

Explanation of Solution

The tongue is a structure that has a function to taste the food item. It also helps in the movement of the food in the oral cavity that aids in the mechanical breakdown of the food material. In mollusks, a structure similar to the tongue is known as radula. The radula is minutely toothed and help in mechanical breakdown of the food. Many mollusks are known to feed on algae and hence, the given blank can be filled with radula.