Chapter 25, Problem 31A

Summary Introduction

To fill:

The given blank with the correct term.

Introduction:

The protists are single celled prokaryotes. Most of the protists are marine and have a large vacuole. This vacuole helps in maintaining the water level in the cells.

Explanation of Solution

The vacuole helps in storage of the water in the protists. The excess water in the cells of the protists are stored in the vacuole which is later expelled out in the external environment. Similarly, crop of the earthworm stores the food that is released in gizzard for digestion. Hence, given blank can be filled with crop.