Chapter 2, Problem 7STP

Summary Introduction

Introduction :

Biomass is the mass of the living organism in a particular area at a given time. Biomass can be of one species or of many species or of a community. It includes all the micro-organisms, plants, or animals.

It is expressed as total mass per unit area.

Answer to Problem 7STP

Correct answer :

The correct answer is option (b) green plants.

Explanation of Solution

Explanation/justification for the correct answer:

Option b) green plants. Biomass increases as the trophic level decreases. Green plants occupy lowest position in the pyramid of ecology, hence they have highest biomass. So, the correct option is option b).

Explanation for incorrect answer :

Option a) foxes. Foxes occupy higher trophic level in the ecology pyramid, hence they have lower biomass.

Option c) mice. Mice also occupy higher trophic level in the ecology pyramid, hence they have lower biomass.

Option d) rabbits. Rabbits occupy second level in the trophic level, hence their biomass is less as compared to green plants.