Science MCQ (1 Marks)

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.