AP 8th Class Biology Bits Chapter 7 Different Ecosystems with Answers

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AP State Syllabus 8th Class Biology Bits 7th Lesson Different Ecosystems with Answers

Choose the correct answer.

Question 1.
All the organisms derive energy from
A) soil
B) water
C) air
D) food
Answer:
D) food

Question 2.
The main source of energy for all living things is
A) Electricity
B) Generator
C) Battery
D) Sun
Answer:
D) Sun

Question 3.
Living organisms that decompose dead animals and plants are called
A) Producers
B) Consumers
C) Decomposers
D) None
Answer:
C) Decomposers

Question 4.
The food web starts from
A) Animals
B) Plants
C) Bacteria
D) Fungi
Answer:
B) Plants

Question 5.
Coringa mangrove is named after the river
A) Ganga
B) Corangi
C) Godavari
D) Kaveri
Answer:
B) Corangi

Question 6.
The area occupied by desert on the land of
A) 17%
B) 18%
C) 19%
D) 20%
Answer:
A) 17%

Question 7.
The camel feeds on
A) insects
B) animals
C) tender shoots
D) roots
Answer:
C) tender shoots

Question 8.
Approximately the solar energy absorbed in the atmosphere is
A) 57%
B) 59%
C) 60%
D) 40%
Answer:
A) 57%

Question 9.
In a food web snakes will be eaten by
A) owl
B) peacock
C) cat
D) rabbit
Answer:
B) peacock

Question 10.
The large ecosystem present on earth is
A) Habit
B) Habitat
C) Biosphere
D) Stratosphere
Answer:
C) Biosphere

Question 11.
Leaves in desert plants are covered by a layer of
A) Hair
B) Fur
C) Water
D) Wax
Answer:
D) Wax

Question 12.
The excretory material in birds is
A) Urea
B) Uric Acid
C) Ammonia
D) None
Answer:
B) Uric Acid

Question 13.
Aestivation can be seen in
A) Summer
B) Winter
C) Spring
D) Autumn
Answer:
A) Summer

Question 14.
Which one of the following acts as primary as well as secondary consumer in the forest ecosystem?
A) Rabbit
B) Deer
C) Man
D) Lion
Answer:
C) Man

Question 15.
Trophic level in an ecosystem represents the
A) Water level
B) Energy level
C) Salt level
D) CO, level
Answer:
B) Energy level

Question 16.
In a pond ecosystem, diatoms are
A) Decomposers
B) Primary consumers
C) Secondary consumers
D) Producers
Answer:
D) Producers

Question 17.
The best example for artificial ecosystem is
A) River ecosystem
B) Spaceship
C) Pond ecosystem
D) Mangrove ecosystem
Answer:
B) Spaceship

Question 18.
The following one can trap the solar energy.
A) Deer
B) Lion
C) Rabbit
D) Green plant
Answer:
D) Green plant

Question 19.
Ecosystems can be destroyed by
A) Cyclones
B) Tsunamies
C) Volcanic erruptions
D) All the above
Answer:
D) All the above

Question 20.
The dry skinned and spiny exoskel-eton animals can be seen in
A) Forest ecosystem
B) Grassland ecosystem
C) Desert ecosystem
D) Pond ecosystem
Answer:
C) Desert ecosystem

Question 21.
The forests that grow near the backwaters of the sea
A) Teak forests
B) Evergreen forests
C) Deciduous forests
D) Mangrove forests
Answer:
D) Mangrove forests

Question 22.
Coringa is the best example for the following
A) River ecosystem
B) Forest ecosystem
C) Mangrove ecosystem
D) Desert ecosystem
Answer:
C) Mangrove ecosystem

Question 23.
The word ecosystem was coined by
A) A.G. Tansley
B) Hackel
C) Aristotle
D) Robert Hooke
Answer:
A) A.G. Tansley

Question 24.
The basic unit of Nature is
A) Habitat
B) Niche
C) Trophic level
D) Ecosystem
Answer:
D) Ecosystem

Question 25.
Several food chains interlinked themselves to form a
A) Food cup
B) Food web
C) Food net
D) None
Answer:
B) Food web

Question 26.
The average rainfall in a desert is
A) Less than 50 mm
B) Less than 40 mm
C) Less than 60 mm
D) Less than 23 mm
Answer:
D) Less than 23 mm

Question 27.
Food web ends at
A) Plants
B) Herbivores
C) Carnivores
D) Top Carnivores
Answer:
D) Top Carnivores

Question 28.
Example for Succulent plant.
A) Neem
B) Banyan
C) Pistia
D) Cactus
Answer:
D) Cactus

Question 29.
The energy in an ecosystem flows in the form of
A) Light
B) Heat
C) Water vapour
D) Food chains
Answer:
D) Food chains

Question 30.
Large number of herbivores can be seen in this ecosystem.
A) Forest
B) Desert
C) Mangrove
D) Grassland
Answer:
D) Grassland

Question 31.
All the energy present at a particular level in the food chains of an ecosystem is called
A) Food web
B) Ecotone
C) Trophic level
D) Food chain
Answer:
C) Trophic level

Question 32.
‘Detritus’ is a
A) Fungus
B) Algae
C) Carnivore
D) Decomposing bacteria
Answer:
D) Decomposing bacteria

Question 33.
Choose the correct matching.
List-A — List-B
i) Lichens — a) Forest ecosystem
ii) Breeding place — b) Desert ecosystem
iii) Elephants — c) Mangrove ecosystem
A) i – a, ii – b, iii – c
B) i – b, ii – a, iii – c
C) i – c, ii – b, iii – c
D) i – b, ii – c, iii – a
Answer:
D) i – b, ii – c, iii – a

Question 34.
Identify the mismatched pair.
i) Energy flow — Food chain
ii) Excretory material of desert animals — Urea
iii) Greater degree of stratification — Forest Ecosystem
A) i, iii
B) ii, iii
C) iii only
D) ii only
Answer:
D) ii only

Question 35.
This will happen if more number of rabbits are artificially introduced in a grass land ecosystem.
A) Even more number of rabbits will be seen
B) Tough competition for food among the rabbits will be seen
C) There will be no change in the ecosystem
D) Growth of the grass will not be affected
Answer:
B) Tough competition for food among the rabbits will be seen

Question 36.

Arrange the flow chart in the correct order.
A) 1, 5, 4, 2, 3
B) 1, 2, 3, 4, 5
C) 5, 4, 3, 2, 1
D) 1, 3, 2, 5, 4
Answer:
D) 1, 3, 2, 5, 4

Question 37.

In the above food web, Zebra is a
A) Producer
B) Secondary consumer
C) Primary consumer
D) Tertiary consumer
Answer:
C) Primary consumer

Question 38.

In the above food chain, which acts as primary as well as secondary consumer?
A) Rabbit
B) Wild cat
C) Hound
D) Man
Answer:
D) Man

Question 39.

Who is the secondary consumer of the food chain?
A) Owl
B) Snake
C) Cat
D) All
Answer:
D) All

Question 40.

What ecosystem do you see in this picture?
A) River ecosystem
B) Forest ecosystem
C) Wet land ecosystem
D) Mangrove ecosystem
Answer:
D) Mangrove ecosystem

Question 41.

This flora can be seen
A) Forest ecosystem
B) Desert ecosystem
C) Grass land ecosystem
D) Mangrove ecosystem
Answer:
B) Desert ecosystem

Question 42.

This fauna is very common in this ecosystem ………….
A) Forest
B) Mangrove
C) Grass land
D) Desert
Answer:
D) Desert

Question 43.

This animal is also known
A) Desert car
B) Desert bus
C) Desert bike
D) Desert ship
Answer:
D) Desert ship

Question 44.

This animal is very common in this ecosystem,
A) Mangrove
B) Desert
C) Forest
D) Grassland
Answer:
C) Forest

Question 45.

This fauna is very common in …………
A) Forests
B) Deserts
C) Mountains
D) Ponds
Answer:
A) Forests

Question 46.
Eco friendly action – Fallen leaves, Vegetable wastes are to be
A) Burn
B) Left as it is
C) Converted into compost manure
D) Thrown in drainage
Answer:
C) Converted into compost manure

Question 47.
Match the following:
Group-A — Group-B
i. Producers — a) Microorganisms
ii. Consumers — b) Living things
iii. Decomposers — c) Animals
iv. Biotic components — d) Habitat
v. Abiotic components — e) Plants.
f) Non iiving forms
g) Biosphere
A) i – a, ii – b, iii – c, iv – d, v – f
B) i – g, ii – e. iii – d, iv – b, v – a
C) i – e, ii – c, iii – a, iv – b, v – f
D) i – c, ii – e, iii – f, iv – b, v – a
Answer:
C) i – e, ii – c, iii – a, iv – b, v – f

Question 48.
Group-A — Group – B
i. Trees — a) Desert
ii. Camel — b) Carrot
iii. Fungi — c) Forest
iv. Rabbit — d) Rodents.
v. Frog — e) Decomposers
f) insects
g) Protozoans
A) i – b, ii – c, iii – d, iv – a, v – f
B) i – a, ii – b, iii – c, iv – d, v – f
C) i – c, ii – d, iii – a, iv – b, v – f
D) i – c, ii – a, iii – e, iv – b, v – f
Answer:
D) i – c, ii – a, iii – e, iv – b, v – f

Question 49.
Which of the following set of organisms are producers in an ecosystem?
A) Shrimp, Spirogyra
B) Mussel, Daphnia
C) Oscillatoria, Ulothrix
D) Euglena, Bacteria
Answer:
C) Oscillatoria, Ulothrix

Question 50.
In Terrestrial ecosystems – P, Q and Desert ecosystems are the different systems. Here what are P & Q?
A) Forest, grassland
B) Grassland, lake
C) Fresh water, marine water
D) Forest, marine water
Answer:
A) Forest, grassland

Question 51.
The desert animals have
A) Only morphological adaptations
B) Only physiological adaptations
C) They don’t have any adaptations
D) Both morphological and physiological adaptations
Answer:
D) Both morphological and physiological adaptations

Question 52.
This will result in plants if there are no stomata in terrestrial plants
A) No transpiration will occur
B) No exchange of gases will take place
C) There will be no affect on plants
D) Both A and B
Answer:
D) Both A and B

Question 53.
The forests that grow where the rivers met with sea are
A) Mangrove
B) Ever forests
C) Mid region forest
D) Grasslands
Answer:
A) Mangrove

Question 54.
The food chain starts with
A) Primary consumers
B) Secondary consumers
C) Producers
D) Tertiary consumers
Answer:
C) Producers

Question 55.
In an Ecosystem, energy transfer from one ecosystem to another. Which is the base of the production of energy in an ecosystem?
A) Plants
B) Herbivores
C) Carnivores
D) Sun
Answer:
D) Sun

Question 56.
Desert is an ecosystem. The conditions are different when we compare other terrestrial ecosystem. Rainfall is very less. Plants does not grow properly. Water scarcity will be seen here. Ani-mals can adopt different types of adaptations.
Choose the correct adaptation seen in the animals.
A) able to live with water scarcity
B) able to live in hot conditions
C) they are nocturnals
D) all the given
Answer:
D) all the given

Question 57.
Terrestrial Ecosystem : Forest :: Aquatic Ecosystem: ?
A) Desert
B) River
C) Grasslands
D) Mountain
Answer:
B) River

Question 58.
Which of the following is artificial Ecosystem?
A) Forest
B) Aquarium
C) Grasslands
D) Desert
Answer:
B) Aquarium

Question 59.
Which of the following influence more changes in an Ecosystem rapidly?
A) Strong winds
B) Earthquake
C) Fire accidents
D) Indiscriminate activities of human
Answer:
D) Indiscriminate activities of human

Question 60.
What is the reason for growing of roots deeply and spreads more in the Xerophytes?
A) To protect from the grazing of ani-mals
B) Water availability is less in sandy soil
C) It has thick and strong leaves
D) To protect from the desert hurricanes
Answer:
B) Water availability is less in sandy soil

Question 61.
Hari advised to the farmers not to use high dose of pesticides. Guess the reason.
A) To reduce the expenditure
B) To protect the insects which are harmful to the crops
C) Food may be not tasty
D) The friendly insects will die which give high yield
Answer:
D) The friendly insects will die which give high yield

Question 62.
Forest is an example for Biodiversity. If all the tigers disappear from forest, result may be
a) Increase in the population of Foxes
b) Increase in the population of Herbivores
c) Increase in the population of Carnivores
d) The number of plants can decrease
Which of the above are suitable?
A) a, b and c
B) b, c and d
C) a and c
D) b and d
Answer:
D) b and d

Question 63.
Teacher said that “it is our responsibility to conserve the mangroves.” The reason is
A) Food available for Acquatic animals
B) They were useful as nursery’s
C) They are protective areas for the endangered species
D) All the given
Answer:
D) All the given