Page 1 - 3.Home Assignment-Ecosystem and its components

SAI International School
Subject-Biology, Class- X
Chapter- Our Environment
Subtopic- Ecosystem and its Components
Module-30
Home Assignment

Objective (MCQ)

In an ecosystem, green plants are known as - 1
1. (a) primary consumers
(b) secondary consumers
(c) producers
(d) tertiary consumers

2. Which one of the following is an artificial ecosystem? 1
(a) Pond
(b) Crop field
(c) Lake
(d) Forest

3. In an ecosystem, herbivores represent - 1
(a) Producers
(b) Primary consumers
(c) Secondary consumers
(d) Decomposers

4. An ecosystem includes - 1
(a) all living organisms
(b) non-living objects
(c) both living organisms and non-living objects
(d) sometimes living organisms and sometimes non-living objects

5. Organisms which synthesize carbohydrates from inorganic compounds using 1
radiant energy are called -
(a) Decomposers
(b) Producers
(c) Herbivores
(d) Carnivores

6. Which of the following is an abiotic component of an ecosystem? 1
(a) Humus
(b) Bacteria
(c) Plants
(d) Fungi

7. Which of the following statement is incorrect? 1
(a) All green plants and blue-green algae are producers
(b) Green plants get their food from organic compounds
(c) Producers prepare their own food from inorganic compounds
(d) Plants convert solar energy into chemical energy