Science MCQ (1 Marks)

Humus

Plants and animals in a forest are not dependent on one another.

Kerosene

Photosynthesis.

Poaching

Goat

Plants and animals in a forest are not dependent on one another.

Marigold

All the above.

Green plants.

Humus

Humus.

Tulsi.

To increase fertility of the soil.

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.

Forests.

Earthworms aids in the decomposition of organic matter such as leaves into humus.

Snake.

All of the above.

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.

Kerosene.

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'.

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

Humus.

Plants and animals in a forest are not dependent on one another.

Dodo

Herbs.

Trees have crowns of different sizes and different types.

Green lungs.

Crown

Producers.

It is a scavenger

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.

Willow

All the above.

Forest is depleting day by day due to the rapid urbanisation.
As urbanising is increasing rapidly thus forest is most rapidly depleting natural resource.

Honey.

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.

All the above

The branchy part of a tree above the stem is the region where leaves grow.
Hence Leaves and branches are collectively known as Crown.

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.

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.

Crown

Heavy rainfall leads to flood in towns and villages.
Drought, volcano and heat waves are the result of lesser rains.

Decomposers are saprotrophs, which decompose the organic remains of plants and animals by secreting extracellular digestive enzymes.
Due to the degradation of organic remains, decomposers are also called reducers.
Heterotrophic bacteria and saprophytic fungi are the important organisms that usually act as decomposers.

Crown.

Tall trees

Those animals which eat dead animals’ area called scavengers.
Scavengers eat up the dead bodies of animals and a help in keeping forest environment clean.
Vultures, crows, jackals, hyena, some insects and beetles are the example of scavengers.
Without scavengers’ dead body of the forest animals could not be got rid of quickly. But they are not decomposers.

The branchy part of the stem is flattened and small in cactus compared to shrubs and mango tree.

Animals excreta pollute forest soil.

He first step in every food chain is the plants.
They are also referred as “Autotrophs”.
The second step in a food chain is always a herbivore.
The third step in a food chain is always a carnivore.

Forest is made up of an array of trees and water bodies that provide food and shelter for all animals, birds, and microorganisms present in the ecosystem.

All of these

Carnivores.

Trees, Shrubs, herbs, vegetation.

Deforestation is the permanent removal of trees to make room for something besides forest.
Therefore, home of thousands of birds, animals and insects are lost due to deforestation.

Plants release oxygen through the process of photosynthesis.

Forests are reservoirs of wildlife as they provide shelter as well as food to animals.
They maintain optimum climatic conditions for the survival of animals.
Hence, animals are conserved in wildlife sanctuaries in their natural habitat.
Forests also help in raining that make the water available to animals.
Hence, the statement given in the question is correct.
So, the correct answer is 'True'.

Shrubs

Forests

A tree has the strongest stem.

Humus

India

Humus

Porcupine is the smallest forest animal among the following given in the options.

Prevent flood.

The branchy part of a tree above the stem is known as the “crown” of the tree.
The crowns of tall trees form a green cover over the forest land.
The major functions of the crown of a tree are to absorb sun’s light energy, carry out photosynthesis, release oxygen and carry out the process of respiration and transpiration.
All these functions are performed by the leaves of the crown.

Mushrooms and other microorganisms known as decomposers feed upon the dead plant and animal tissues and convert them into a dark coloured substance called humus.

Green plants.

Deforestation leads to the increased percentage of carbon dioxide components of the environment because trees provide oxygen by taking up carbon dioxide when their number reduces the carbon dioxide was unable to be converted into oxygen.
That's why its components increases.

All of these

Crown

Plants and animals in a forest are not depend on one another.

All of these

Green lungs

Forests serve as green lungs as they produce oxygen for breathing and respiration and help in maintaining oxygen and carbon dioxide balance in the atmosphere.

Semal, sal, khair, neem, and palash are examples of trees.
Hornbill, chinkara, and blue bull are animals.

Forest trees are cut down to obtain natural rubber.

Less noise pollution.

Salt.

None of the above.

Humus retains moisture from the atmosphere and helps soil aeration, which increases soil fertility.

Tropical Semi Evergreen forests are found in most parts of India.

Formation of soil.

Kerosene.

All of these.

Plants provide shelter for animals and they make oxygen for the animals to live.
When animals die they decompose and become natural fertilizer plants.
Plants depend on animals for nutrients, pollination and seed dispersal.
Hence Plants and animals in the forest are dependent on one another.
Hence the given statement Plants and animals in the forest are not dependent on one another is a wrong statement.

Crown

It is the correct chain that contains primary consumers.

Furniture industry

All of the above.

Consumed

Increase in carbon dioxide will result in global warming.

Humus.

Explanation for correct option:
Teak produces wood which is further used for different works.
eak's high oil content, strong tensile strength, and tight grain make it ideal for applications requiring weather resistance.
It's used to make things like patio furniture and boat decks.
Explanation for incorrect options:
Amla, tulsi and neem are medicinal plants
These three have been used for centuries to treat acne, diabetes, stomach difficulties, joint problems, skin illnesses, hair loss, fever, cold and cough, heart disease, and many other ailments.

Humus.

From the above given options, semal and hornbill are the names of a tree and an animal, respectively.

From the above given options, semal and hornbill are the names of a tree and an animal, respectively.

The forest has a wide variety of animals.
The type of animals also differ from forest to forest.
The common animals which are found in forest in our country are monkey, jackal, elephants, tigers, lions, squirrel, porcupine, peacock, snakes, honey bees and other various small animals.
The insects such as butterflies, honey bees and birds help in flowering plants of the forest in pollination not an Antelopes.
An African animal with horns and long, thin legs that can run very fast.
It looks like deer.

Humus

Fungi.

Forests are areas of biodiversity hot spots, as we know.
They are full of plants, trees, animals and birds.
Even the dead bodies of plants and animals are decayed by saprophytes, supporting large forms of life.
In this process, they provide the soil with nutrients that help the seeds to grow properly and support new forms of life.
So we can say that forests are dynamic living entities.

Different layers of vegetation provide food and shelter for animals.

All of these are animals.

They produce humus.

Forests are not responsible for creating flood conditions, as they protect form flood condition.

Food.

Plants and animals in a forest are not dependent on one another.

All of the above.

Thermocol is not prepared from the wood obtained from the forest. Paper, matchsticks and plywood are prepared from the wood.

In a forest, trees form the uppermost layer followed by shrubs and the herbs form the lowest layer of vegetation

Canopy.

Zoo and Aquarium are man made habitat, whereas forest is natural habitat which provide food and shelter for wildlife and other small animals in the ecosystem.

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.

 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.

None of the above.

Humus.

None of the above.

Plants and animals in a forest are not dependent on each other.

Forests are useful in many ways such as, controlling atmospheric pollution, prevention of soil erosion, providing shelter to wild animals, maintenance of water cycle.

Teak, bamboo and Sheesham are used to obtain different types of wood. they are commonly used in the furniture industry for making tables, chairs, beds etc.
Neem is a medicinal plant, which is used as a herb most of the time.

It is not a forest product.

Herbs and shrubs obtain nutrients from humus and dead decay from the ground in the forest floors, thus can easily be traced together in the forest.

Porcupine is the smallest forest animal among the following given in the options.

All of the above.

None of the above.

The top layer of tall plants receives maximum sunlight.
This layer is mentioned as an emergent layer in the diagram.
The below plants in the canopy and understory region receive less amount of sunlight as compared to the emergent layer.
The forest floor receives a minimum amount of sunlight.

Cattle ranching is the practice of raising cattle's on large tracts of land.
Cattle ranching depletes the land of nutrients because cattle often eat to the very dirt, destroying all biomass on a piece of land and making it very hard for the habitat to restore itself
Cattle ranching is the leading cause of deforestation in the Amazon rainforest.

All of the above.

Herbs.

Crown.

 Deforestation is the permanent removal of trees to make room for something besides the forest.
This can include clearing the land for agriculture or grazing or using the timber for fuel, construction, or manufacturing.
It effects the wildlife present in that habitat.

Kerosene.

Porcupine is not the name of a tree rather it is an animal. Teak, sal and kachnar are names of trees.