Can a forest regenerate naturally in a short period of time?
A forest can regenerate naturally, to some extent with herb and grass vegetation in a short period of time. Reforestation... View Article
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Describe the flow of blood through the heart of human beings
Deoxygenated blood from different organs comes to the right atrium through the vena cava. From the right atrium, blood goes... View Article
Total earth’s surface covered by water is (a) 75% (b) 60% (c) 85% (d) 50%
a) 75% Explanation About 75% percent of the Earth’s surface is water-covered, and the oceans hold about 96.5 percent of... View Article
Whittaker proposed five kingdom classification. (True or False)
True Explanation R. H. Whittaker proposed the five kingdom classification. The five kingdom classification are- Monera, Protista, Fungi, Plantae and... View Article
The human egg has a head, middle piece and tail. (True or False)
False Human sperm has head, middle piece and tail, and not the human egg. The Head contains acrosome apically, which... View Article
Sunlight and air are inexhaustible natural resources. Comment.
Inexhaustible natural resource is a natural resource that will never run out. It will not be depleted and will continue... View Article
Why and how does water enter continuously into the root xylem?
Root hairs are present in the root and they have thin walls. A process called osmosis is responsible for the... View Article
Growing of wheat and groundnut on the same field is called as ______.
Growing of Wheat and groundnut on the same field is called as mixed cropping or intercropping Explanation When two or... View Article
Differentiate between flying lizard and bird. Draw the diagram.
Flying Lizard Birds It belongs to the Reptilia class. It belongs to the Aves class. Their body has scales. Their... View Article
Blue-green algae belong to the kingdom Protista. (True or False)
False Explanation Cyanobacteria or blue-green algae are monerans and not protists because they are prokaryotic in nature. Blue-Green Algae are... View Article
Evaporation of a liquid at room temperature leads to a___ effect.
Evaporation of a liquid at room temperature leads to a cooling effect. Explanation Evaporation can generally be defined as a... View Article
Why is it not advisable to burn plastic and synthetic fabrics?
Burning of plastics and synthetic fabrics produces lots of poisonous gases, causing air pollution. So, it is not advisable to... View Article
How does aerobic respiration differ from anaerobic respiration?
Aerobic Respiration Anaerobic Respiration Oxygen is present when this form of respiration takes place. Oxygen is absent when this form... View Article
Evaporation produces cooling. Comment on the following statement.
Evaporation produces cooling as the particles at the surface of the liquid gain energy from the surroundings and change into... View Article
Why are endemic organisms in greater danger of becoming extinct?
Endemic species are those which are only found in a given region or location and nowhere else in the world.... View Article
CNG is less polluting fuel than petrol and diesel. (True or False)
(e) True. CNG is compressed natural gas formed under high pressure and when it burns it does not produce smoke.... View Article
Why is excess use of fertilizers detrimental for the environment?
Excess use of fertilizers causes environmental pollution as their residual and unused amounts will become pollutants for air, water and... View Article
What is a GM crop? Name any one such crop which is grown in India.
Genetically modified crops are those crops whose genetic identity is altered and redefined using genetic engineering techniques.Cotton and mustard are... View Article
Starting from Class, Species comes before the Genus. (True or False)
False Explanation The hierarchical order of classification is as follows, Kingdom, Phylum, Class, Order, Family, Genus and Species. The kingdom... View Article
Which cell organelle controls most of the activities of the cell?
The nucleus is the most important part of the cell which regulates all the cellular activities by controlling the enzymes... View Article
