MCQ Biodiversity. We covered all the MCQ Biodiversity in this post for free so that you can practice well for the exam.
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MCQ on Biodiversity for Students
How many trophic levels are usually present in a food chain?
(a) One
(b) Four
(c) Numerous
(d) Five
Option d – Five
In a terrestrial ecosystem, green plants capture 1% of the energy of sunlight that falls on their leaves and converts it into
(b) muscular energy
(c) electrical energy
(d) potential energy
How much energy is transferred from one level of consumers to the next?
(a) All of it
(b) Only organic matter is transferred
(c) 10% of the energy received by it
(d) 50% of the energy received by it
Option c – 10% of the energy received by it
All green plants and certain blue-green algae make their food by making organic compounds like sugar and starch from inorganic substances using the radiant energy of the Sun in presence of chlorophyll. The process is
(a) respiration
(b) photosynthesis
(c) oxidation
(d) sustenance
Option b – photosynthesis
The interdependence of organisms on other organisms for their sustenance is described by
(a) ecosystem
(b) biosphere
(c) food chains
(d) heterotrophs
Option c – food chains
Each step or level of the food chain forms an
(a) trophic level
(b) food web
(c) layer
(d) crust
Option a – trophic level
Interactions among various components of the environment involve …………. from one component of the system to another.
(a) the flow of hereditary information
(b) the flow of food particles
(c) flow of energy
(d) flow of oxygen
Option c – flow of energy
Which of the statement is incorrect?
(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.
All the interacting organisms in an area together with the non-living constituents of the environment form
(a) community
(b) ecosystem
(c) atmosphere
(d) soil
Option b – ecosystem
An ecosystem consists of a biotic component comprising living organisms
(a) an abiotic component
(b) comprising physical factors
(c) Both (a) and (b)
(d) None of these
Option c – Both (a) and (b)
Which is the abiotic component of the ecosystem?
(a) Humus
(b) Bacteria
(c) Plants
(d) Fungi
Option a – Humus
Who coined the term ecosystem?
(a) Tansley
(b) Odum
(c) Warming
(d) Darwin
Option a – Tansley
Growth, reproduction, and other activities of living organisms are affected by
(a) abiotic components only
(b) biotic components only
(c) both biotic and abiotic components
(d) some other factors
Option c – both biotic and abiotic components
Types of ecosystems are
(a) mountains and aquariums
(b) natural ecosystems like forests, ponds, and lakes
(c) artificial ecosystems like gardens and crop fields
(d) Both (b) and (c)
Option d – Both (b) and (c)
All consumers whether herbivores, carnivores, or parasites depend on ………. directly or indirectly for their sustenance by feeding on other consumers
(a) producers or plants
(b) air
(c) water
(d) light
Option a – producers or plants
The microorganisms that break down the complex organic substances of dead remains and waste products of organisms into simpler inorganic substances are called
(a) vultures
(b) decomposers
(c) omnivores
(d) None of these
Option b – decomposers
Accumulation of non-biodegradable pesticides in the food chain in an increasing amount at each higher trophic level is known as
(a) eutrophication
(b) pollution
(c) biomagnification
(d) accumulation
Option c – biomagnification
The decomposers in an ecosystem
(a) convert inorganic material to simpler forms.
(b) convert organic material to inorganic forms.
(c) convert inorganic materials into organic compounds.
(d) do not break down organic compounds.
Carnivores represent
(a) primary consumers
(b) secondary and tertiary consumers
(c) reducers
(d) zooplankton
Option b – secondary and tertiary consumers
Non-biodegradable waste is
(a) garbage
(b) metallic articles
(c) sewage
(d) waste paper
Option b – metallic articles
In every food chain, green plants are
(a) decomposers
(b) producers
(c) consumers
(d) None of the above
Option b – producers
Which of the following is a non-biodegradable substance?
(a) Polythene
(b) Cotton cloth
(c) Leaves
(d) Vegetable peels
Option a – Polythene
Biodegradable substances are those substances that
(a) can be broken down by the action of bacteria or other saprophytes.
(b) cannot be acted upon by physical processes like heat and pressure.
(c) persist in the environment for a long time.
(d) may harm the various members of the ecosystem.
Option a – can be broken down by the action of bacteria or other saprophytes
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