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Habitat and Adaptation Class 6 mcq. We covered all the Habitat and Adaptation Class 6 mcq in this post for free so that you can practice well for the exam.
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mcq on Habitat and Adaptation for Class 6th Students
What happens to the oxygen level in pond water during the summer season?
a. Oxygen concentration decreases
b. Oxygen concentration increases
c. Salt concentration decreases
d. Diatom Population increases
Option a – Oxygen concentration decreases
Which of the following is an example of zooplankton?
a. Hydrilla
b. Nitella
c. Rotifers
d. Frogs
Option c – Rotifers
Identify the free-floating aquatic plant from the options below:
a. Vallisneria
b. Hydrilla
c. Spirogyra
d. Pistia
Option d – Pistia
Volvox and Euglena are classified as:
a. Submerged aquatic plants
b. Floating aquatic plants
c. Microscopic algae (phytoplankton)
d. Thread-like algae
Option c – Microscopic algae (phytoplankton)
Lakes and ponds are examples of:
a. Stationary water bodies
b. Flowing aquatic systems
c. Oceanic water bodies
d. None of the above
Option a – Stationary water bodies
Which of these water bodies usually does not dry up or freeze completely?
a. Ponds
b. Lakes
c. Streams
d. All of the above
Option b – Lakes
To reduce water loss from body fluids, marine animals retain:
a. Uric Acid
b. Ammonia
c. Urea
d. Glucose
Option c – Urea
What are the conditions like in the deeper ocean layers?
a. Only dark
b. Only cold
c. Both dark and cold
d. Dark and warm
Option c – Both dark and cold
Having a weak skeletal structure is typical in:
a. Floating Organisms (plankton)
b. Active swimmers (nekton)
c. Creatures from deep sea environments
d. None of these
Option c – Creatures from deep sea environments
Which Environment is known for experiencing frequent environmental changes?
a. Open ocean
b. Ocean floor (benthic zone)
c. Coastal seashore
d. All of the above
Option c – Coastal seashore
Light penetration is minimal in the:
a. Upper sunlit zone (euphotic)
b. Dark zone (aphotic)
c. Deep sea region (abyssal)
d. None of the above
Option c – Deep sea region (abyssal)
The area where a river meets the ocean is called:
a. Delta
b. Estuary
c. Bay
d. Continental slope
Option b – Estuary
For every 10 meters of depth, the pressure in the sea increases by:
a. 1 Atmosphere
b. 15 atmospheres
c. 20 atmospheres
d. 25 atmospheres
Option a – 1 Atmosphere
Which of the following is considered part of the para-biosphere?
a. Open ocean
b. River
c. Woodland
d. Polar ice regions
Option d – Polar ice regions
A physical factor of land ecosystems includes:
a. Type of soil present
b. Various Salts in the soil
c. Overall Salt concentration in soil
d. Organic Matter levels in the soil
Option a – Type of soil present
Which organism in a Forest acts both as a primary and secondary consumer?
a. Rabbit
b. Deer
c. Lion
d. Human
Option d – Human
A trophic level in an ecosystem indicates the:
a. Level of water
b. Level of energy flow
c. Amount of Salt
d. Quantity of oxygen
Option b – Level of energy flow
In a pond, diatoms function as:
a. Decomposers
b. First-level producers
c. Herbivores
d. Secondary consumers
Option b – First-level producers
Zooplankton are categorized under:
a. Producers
b. Herbivorous consumers
c. Carnivorous consumers
d. Apex consumers
Option b – Herbivorous consumers
Which pollutant is mainly emitted from coal mine exhausts?
a. Carbon monoxide
b. Carbon dioxide
c. Water vapor
d. Ash particles
Option a – Carbon monoxide
Burning petrol leads to the release of:
a. Wood ash
b. Kerosene residue
c. Trimethyl lead
d. Coal soot
Option c – Trimethyl lead
Oceans serve as storage areas for which gas?
a. Carbon monoxide
b. Carbon dioxide
c. Nitrogen
d. Oxygen
Option b – Carbon dioxide
Catalytic converters are installed in:
a. Motor vehicles
b. Wind energy setups
c. Poultry units
d. Dairy units
Option a – Motor vehicles
Which gas is commonly used to disinfect water?
a. Nitrogen
b. Carbon dioxide
c. Chlorine
d. Helium
Option c – Chlorine
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