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Science MCQ (1 Marks)

Forests: Our Lifeline · UP Board (UPMSP) STD 7 (UPMSP - English Medium). 158 questions.

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MCQ (1 Marks)

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50 questions · timed · auto-graded

MCQ 11 Mark
Micro-organisms act upon the dead plants to produce
  • A
    sand
  • B
    mushrooms
  • ✓
    Humus
  • D
    wood
Answer
Correct option: C.
Humus
Humus
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MCQ 21 Mark
Which of the following statements is not correct?
  • A
    Forests protect the soil from erosion.
  • ✓
    Plants and animals in a forest are not dependent on one another.
  • C
    Forests influence the climate and water cycle.
  • D
    Soil helps forests to grow and regenerate.
Answer
Correct option: B.
Plants and animals in a forest are not dependent on one another.
Plants and animals in a forest are not dependent on one another.
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MCQ 31 Mark
Which of the following is not a forest product?
  • A
    Gum
  • B
    Plywood
  • C
    Sealing wax
  • ✓
    Kerosene
Answer
Correct option: D.
Kerosene
Kerosene
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MCQ 41 Mark
What are the effects of deforestation?
  • A
    Increase in the temperature of the Earth.
  • B
    Increase in the soil erosion.
  • C
    Increase in the $CO_2$​ level of atmosphere.
  • ✓
    All of the above.
Answer
Correct option: D.
All of the above.

Deforestation is the cutting down of trees of the forest.
Due to this, the number of trees that can consume $CO_2$​ and give out oxygen through photosynthesis, decreases.
Thus, there is an increase in atmospheric $CO_2$​ levels.
As the $CO_2$​ level increases, the greenhouse effect starts.
In this, $CO_2$​ and other greenhouse gases, trap the heat of the sunlight and do not let it go.
This raises the temperature of the Earth causing global warming.
The roots of the trees hold the soil particles. Therefore, without trees, the topsoil gets washed away by water and wind and causes soil erosion.

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MCQ 51 Mark
Green plants synthesize their food by the process of $........$
  • A
    Respiration.
  • ✓
    Photosynthesis.
  • C
    Crown.
  • D
    Reproduction.
Answer
Correct option: B.
Photosynthesis.
Photosynthesis.
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MCQ 61 Mark
Which is not a consequence of deforestation?
  • A
    Desertification
  • B
    Global warming
  • ✓
    Poaching
  • D
    Floods
Answer
Correct option: C.
Poaching
Poaching
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MCQ 81 Mark
Which of the following statements is not correct?
  • A
    Forests protect the soil form erosion.
  • ✓
    Plants and animals in a forest are not dependent on one another.
  • C
    Forests influence the climate and water cycle.
  • D
    Soil helps forests to grow and regenerate.
Answer
Correct option: B.
Plants and animals in a forest are not dependent on one another.
Plants and animals in a forest are not dependent on one another.
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MCQ 91 Mark
Some herbs and plants that were used in ancient times for making drugs and are even now used for the same purpose. Which of the following is not one of these?
  • ✓
    Marigold
  • B
    Foxglove
  • C
    Belladona
  • D
    The plant of castor oil.
Answer
Correct option: A.
Marigold
Marigold
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MCQ 101 Mark
Which of the following statement is or are correct?
  • A
    The layer of vegetation in a forest which is just below the understorey, is called shrub layer.
  • B
    The layer of vegetation in the forest which is just below the shrub layer, is called the herb layer.
  • C
    The forest floor is also considered a layer of vegetation in the forest structure.
  • ✓
    All the above.
Answer
Correct option: D.
All the above.
All the above.
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MCQ 111 Mark
Which of the following are called producers?
  • A
    Plerbivores.
  • B
    Carnivores.
  • ✓
    Green plants.
  • D
    Bacteria and fungi.
Answer
Correct option: C.
Green plants.
Green plants.
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MCQ 121 Mark
Microorganisms produce $........$ by acting upon the dead plants.
  • A
    Wood
  • ✓
    Humus
  • C
    Mushrooms
  • D
    Sand
Answer
Correct option: B.
Humus
Humus
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MCQ 131 Mark
When we destroy a forest we destroy:
  • ✓
    An ecosystem
  • B
    Plant life
  • C
    Population of wild life
  • D
    Food and shelter of wild animals
Answer
Correct option: A.
An ecosystem
When we destroy a forest we destroy an ecosystem.
An ecosystem refers to the geographical area where both biotic and abiotic components are present and all biotic components depend on the abiotic components as well as on each other for survival
The biotic components of an ecosystem are living organisms such as plants, animals, microorganisms, etc.
However, water, air, land, soil, atmosphere, etc are the non$-$living or abiotic components of an ecosystem.
A forest harbors all kinds of living organisms like plants, animals, microbes as well as the abiotic components like water, air, soil, atmosphere, etc.
Thus, destruction of a forest is equivalent to destroying an ecosystem.
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MCQ 141 Mark
Micro$-$organisms act upon the dead plants to produce.
  • ✓
    Humus.
  • B
    Sand.
  • C
    Wood.
  • D
    Mushroom.
Answer
Correct option: A.
Humus.
Humus.
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MCQ 151 Mark
Which of the following is a medicinal plant?
  • A
    Mango.
  • B
    Rose.
  • ✓
    Tulsi.
  • D
    Timber.
Answer
Correct option: C.
Tulsi.
Tulsi.
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MCQ 161 Mark
The dead and decaying material present on the forest floor helps:
  • ✓
    To increase fertility of the soil.
  • B
    To increase the carbon dioxide concentration.
  • C
    To increase the oxygen concentration.
  • D
    All of the above.
Answer
Correct option: A.
To increase fertility of the soil.
To increase fertility of the soil.
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MCQ 171 Mark
Which of the following helps in the formation of humus?
  • A
    Plants
  • B
    Animals
  • ✓
    Decomposers
  • D
    None of the above
Answer
Correct option: C.
Decomposers
The micro $-$ organisms which convert the dead plants and animals to humus are known as decomposers.
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MCQ 181 Mark
Boojho visited a forest near his town with his classmates and his teacher. As they were entering the forest, their class teacher told them not to make noise in the forest as noise could disturb the:
  • A
    Birds.
  • B
    Animals.
  • ✓
    Both $(a)$ and $(b).$
  • D
    Plants.
Answer
Correct option: C.
Both $(a)$ and $(b).$

As Boojho was entering the forest, his class teacher told him not to make noise in the forest because it could disturb both birds and animals.

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MCQ 191 Mark
Which of the following plant helps to prepare medicine?
  • A
    Amla
  • B
    Neem
  • C
    Tulsi
  • ✓
    All of the above
Answer
Correct option: D.
All of the above
Amla, Neem and tulsi have healing properties used to prepare medicines.
Amla is rich in vitamin $c$ and other nutrients which are helpful in boosting immunity.
Neem have antibacterial properties which fights infections on the skin.
Tulsi, an herb is used to treat cough, asthma and other respiratory problems.
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MCQ 201 Mark
Floods can be controlled by:
  • ✓
    Forests.
  • B
    Constructing temporary shelters.
  • C
    Constructing Pits.
  • D
    By allowing the water to flow into the sea.
Answer
Correct option: A.
Forests.
Forests.
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MCQ 211 Mark
Which of the following helps in the formation of humus?
  • ✓
    Earthworm
  • B
    Lion
  • C
    Birds
  • D
    Leech
Answer
Correct option: A.
Earthworm
Earthworms aids in the decomposition of organic matter such as leaves into humus.
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MCQ 221 Mark
Find the missing word from the following equation Grass $\rightarrow$ insects $\rightarrow$ frog $\rightarrow ..........\rightarrow$ eagle.
  • A
    Peacock.
  • ✓
    Snake.
  • C
    Koel.
  • D
    Crow.
Answer
Correct option: B.
Snake.
Snake.
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MCQ 231 Mark
The variety of plants found in forests includes.
  • A
    Shrubs.
  • B
    Climbers.
  • C
    Creepers.
  • ✓
    All of the above.
Answer
Correct option: D.
All of the above.
All of the above.
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MCQ 241 Mark
Which of the following is not a function of the forests?
  • A
    Maintenance of water cycle.
  • B
    Bringing sufficient rains.
  • C
    Preventing flash floods.
  • ✓
    Causing soil erosion.
Answer
Correct option: D.
Causing soil erosion.
Forests help in maintain water cycle in nature and hence bring sufficient rain.
Forests prevent soil erosion and floods and hence help in the conservation of soil.
Forests also maintain the balance between carbon dioxide and oxygen in the atmosphere.
Destruction of forests can change the earth’s climate.
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MCQ 251 Mark
Which of the following is not a forest product?
  • A
    Gum.
  • B
    Plywood.
  • C
    Sealing wax.
  • ✓
    Kerosene.
Answer
Correct option: D.
Kerosene.
Kerosene.
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MCQ 261 Mark
Which of the following helps the soil to prevent the flood?
  • ✓
    Forest
  • B
    Animals
  • C
    Fishes
  • D
    None of the above
Answer
Correct option: A.
Forest
Trees help keep soil in place by holding a large amount of soil with there roots.
Without trees, rain runs off soil into rivers and streams, raising the water level which leads to floods.
Planting trees acts to shield soil from the winds, and the mulch from fallen leaves forms a layer to protect the soil on the "forest" floor.
Hence the forest helps the soil to prevent the flood.
So, the correct answer is 'Forest'.
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MCQ 271 Mark
Which of the following plant provides woods for construction?
  • A
    Sheesham
  • B
    Bamboo
  • C
    Wheat
  • ✓
    Both $A$ and $B$
Answer
Correct option: D.
Both $A$ and $B$

 Sheesham produces rosewood, while bamboo produces wood.
These are used for construction purpose.
Wheat is consumed as food and not used for construction.

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MCQ 281 Mark
Micro$-$organisms act upon the dead plants to produce
  • A
    Sand.
  • B
    Mushrooms.
  • ✓
    Humus.
  • D
    Wood.
Answer
Correct option: C.
Humus.
Humus.
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MCQ 291 Mark
Which of the following statements is not correct?
  • A
    Forests protect the soil from erosion.
  • B
    Plants and animals in a forest are not dependent on one another.
  • C
    Forests influence the climate and water cycle.
  • ✓
    Soil helps forests to grow and regenerate.
Answer
Correct option: D.
Soil helps forests to grow and regenerate.
Plants and animals in a forest are not dependent on one another.
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MCQ 301 Mark
Which of the following type of crown is seen pine trees?
  • ✓
    Conical
  • B
    Broad
  • C
    Round
  • D
    None of the above
Answer
Correct option: A.
Conical
Option $(A):$
Crown refers to the entire structure above ground including branches, leaves and reproductive parts of a tree.
Conical shape of the crown is seen in pine trees where the leaves, branches grow in the form of a cone on the stem.
Option $(B):$
Broad crown is where the upper part forms a wide and flat structure such as oaktree,
Option $(C):$
Round crown is seen in climacteric fruit trees such as Mango, Lichi etc. In these trees the crown form a round or spherical structure.
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MCQ 311 Mark
A tree species in Mauritius failed to reproduce because of extinction of a fruit eating bird. The bird was
  • A
    Condor
  • ✓
    Dodo
  • C
    Dove
  • D
    Skua
Answer
Correct option: B.
Dodo
Dodo
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MCQ 321 Mark
Which forms the lowest layer in a forest?
  • A
    Tall Trees.
  • B
    Shrubs.
  • ✓
    Herbs.
  • D
    None of these.
Answer
Correct option: C.
Herbs.
Herbs.
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MCQ 331 Mark
Choose the correct statement.
  • ✓
    Trees have crowns of different sizes and different types.
  • B
    Trees have crowns of same sizes and different types.
  • C
    Trees have crowns of different sizes and same type.
  • D
    None of the above is correct.
Answer
Correct option: A.
Trees have crowns of different sizes and different types.
Trees have crowns of different sizes and different types.
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MCQ 341 Mark
Forests are called:
  • ✓
    Green lungs.
  • B
    Black skin.
  • C
    Red kidney.
  • D
    Brown heart.
Answer
Correct option: A.
Green lungs.
Green lungs.
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MCQ 351 Mark
Which of the following is the branchy part of a tree?
  • A
    Stem tip
  • B
    Apical stem
  • ✓
    Crown
  • D
    Axillary stem
Answer
Correct option: C.
Crown
Crown
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MCQ 361 Mark
Green plants are also referred as $..........$
  • A
    Consumers.
  • ✓
    Producers.
  • C
    Decomposers.
  • D
    Herbivores.
Answer
Correct option: B.
Producers.
Producers.
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MCQ 371 Mark
An animal which feeds on dead organisms is a:
  • ✓
    Scavenger
  • B
    First level carnivore
  • C
    Second level carnivore
  • D
    Parasite
Answer
Correct option: A.
Scavenger
It is a scavenger
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MCQ 381 Mark
The branchy part of a tree above the stem is known as:
  • ✓
    Crown.
  • B
    Canopy.
  • C
    Sapling.
  • D
    Humus.
Answer
Correct option: A.
Crown.
The branchy part of a tree above the stem is known as the crown of the tree. The crown includes the top part of a tree which has all the branches and leaves of the tree.
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MCQ 391 Mark
The cricket bats are made out of wood of which of the following?
  • A
    Sal
  • B
    Rose wood
  • C
    Teak
  • ✓
    Willow
Answer
Correct option: D.
Willow
Willow
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MCQ 401 Mark
Boojho appeared in class test but he confused to know the correct statement. Would you help him to know that?
  • A
    Forests are cut down to obtain wood for making paper.
  • B
    Forests are cut down to clear land for cultivation of crops in agriculture.
  • C
    Forests are cut down to clear land for the construction of roads, houses, industries and dams etc.
  • ✓
    All the above.
Answer
Correct option: D.
All the above.
All the above.
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MCQ 411 Mark
In the last year board examination, Rahul were asked a question where he had to choose the statement which was$/$ were incorrect? Will you be able to answer this question?
  • A
    Forests help in cleaning air and purifying water.
  • B
    Forests provide food, water, shelter and medicine to the forest $-$ dwelling people.
  • C
    Forests provide a natural habitat to wild animals and birds and hence help in the conservation of wildlife.
  • ✓
    Cutting down of forests is driving out many populations, which help many people to build houses, factories and bridge etc.
Answer
Correct option: D.
Cutting down of forests is driving out many populations, which help many people to build houses, factories and bridge etc.
Many tribal people of our country live in the forests.
Forests are the lifeline for the forest$-$dwelling people.
The cutting down of forests is driving out many populations but these are curse for them.
Trees gives us oxygen, medicine, food, rain as well as shelter for human beings and animals.
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MCQ 421 Mark
The most rapidly depleting resource in the world is:
  • A
    Water
  • ✓
    Forest
  • C
    Wind
  • D
    Sunlight
Answer
Correct option: B.
Forest
Forest is depleting day by day due to the rapid urbanisation.
As urbanising is increasing rapidly thus forest is most rapidly depleting natural resource.
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MCQ 431 Mark
Which one of the following is an animal product?
  • A
    Gum.
  • B
    Catechu.
  • ✓
    Honey.
  • D
    Rubber.
Answer
Correct option: C.
Honey.
Honey.
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MCQ 441 Mark
Which of the following does not lead to the depletion of groundwater?
  • ✓
    Afforestation.
  • B
    Deforestation.
  • C
    Cultivation of high yielding varieties of crops.
  • D
    Establishing thermal power plants.
Answer
Correct option: A.
Afforestation.
The planting of trees does not deplete the groundwater level.
Vegetation slows down the flow of rainwater on land and increases the absorption of water by the soil.
Both crops and thermal plants require a huge amount of water.
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MCQ 451 Mark
In a quiz competition, you are asked a question where you have to choose the statement which is$/$ are correct?
  • A
    The cutting down of forest leads to soil erosion.
  • B
    Cutting down of forest leads to the loss of many species of animals and birds.
  • C
    The destruction of forests is also leading to the loss of many species of plants from this earth.
  • ✓
    All the above
Answer
Correct option: D.
All the above
All the above
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MCQ 461 Mark
Leaves and branches are collectively known as:
  • ✓
    Crown
  • B
    Trunk
  • C
    Root
  • D
    None of the above
Answer
Correct option: A.
Crown
The branchy part of a tree above the stem is the region where leaves grow.
Hence Leaves and branches are collectively known as Crown.
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MCQ 471 Mark
Correct options regarding the importance of forests in the ecosystem are?
  • A
    Protect soil and provide habitat to a large number of animals.
  • B
    Source of medicinal plants, timber and many other useful products.
  • C
    Forests help in bringing good rainfall in neighbouring areas.
  • ✓
    All of the above
Answer
Correct option: D.
All of the above
Forests play an important role in the ecosystem$-$
They provide oxygen.
Protect soil and provide habitat to a large number of animals.
Source of medicinal plants, timber and many other useful products.
Forests help in bringing good rainfall to neighbouring areas.
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MCQ 481 Mark
Which of the following provides nutrients to the seedling to grow in forest?
  • A
    Grubs
  • B
    Beetles
  • C
    Bacteria
  • ✓
    Decaying animals dung.
Answer
Correct option: D.
Decaying animals dung.
The animals living in the forests excrete the nitrogenous wastes which is acted upon by the microbes.
The complex materials in the dung is converted into simpler form of nutrients.
These nutrients are taken up by the plants and trees in the forests.
The new seedling utilises the nutrients from this decayed dung.
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MCQ 491 Mark
Roof of the forest made by the branches of the tall trees is called:
  • ✓
    Canopy
  • B
    Crown
  • C
    Understoreys
  • D
    None of these
Answer
Correct option: A.
Canopy
Canopy
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MCQ 501 Mark
The top part of trees in forest is called:
  • ✓
    Canopy
  • B
    Crown
  • C
    Understorey
  • D
    Tindall effect
Answer
Correct option: A.
Canopy
The upper or top parts of trees in the forest is called as canopy.
The branchy part of a tree above the stem is known as the crown.
Trees creating different horizontal layers in the forest are called Understoreys.
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