Chapter 2, Problem 1STP

Summary Introduction

Introduction :

The complex relation of living organisms with their physical environment, along with their inter-relationship in a particular unit of space, is defined as ecosystem. An ecosystem comprises of both abiotic or physical components such as soil, water, sunlight, other non-living elements and biotic components consisting of living organisms.

Answer to Problem 1STP

Correct answer :

The correct answer is option (C) living and non-living things in a pond.

Explanation of Solution

Explanation/justification for the correct answer :

Option (C) living and non-living things in a pond. An ecosystem can be defined as a community of living organisms in association with the non-living components of their environment and interacting with one another as a system. The nonliving or abiotic and living or biotic components are linked together through nutrient cycles and energy flow.So, the correct answer is option (C).

Explanation for incorrect answer :

Option (A). Bacteria living in a deep ocean vent. All microbes involved within the deep sea vent thrive without the use of light which is a key abiotic factor for other organisms. So, this is an incorrect answer.

Option (B) Biotic factors in a forest. An ecosystem includes both biotic and abiotic factors and interactions between them. So, this is an incorrect answer.

Option (D). Population of zebras and lions. In an ecosystem, the biotic components such as organisms depend on the abiotic or physical factors for their existence. So, this is an incorrect answer.