What is metamorphosis? Give examples.
Metamorphosis is a biological process by which animals, including insects, amphibians and few aquatic animals undergo extreme and rapid physical... View Article
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What is menstruation? Explain.
Definition of Menstruation Menstruation is the process of the shedding of the uterine lining on a regular monthly basis in... View Article
What is irrigation? Describe two methods of irrigation which conserve water.
The supply of water to crops at appropriate intervals is called irrigation. The time and frequency of irrigation vary according... View Article
What does flora mean?
Flora means the plant life of a particular area. FLORA AND FAUNA Flora- The plant life of a particular area.... View Article
The process of fusion of the male and the female gametes is called Option A : fertilization Option B : pollination Option C : reproduction Option D : seed formation
Correct option: A Solution: The process of fusion of the male and the female gametes is called fertilization.
What is density with an example
Answer: The mass per unit volume of a substance is called density. Density = mass/volume Arrange the following in order... View Article
If a woman is using copper-T, will it help in protecting her from sexually-transmitted diseases?
No. Copper-T which is placed in the uterus prevents pregnancy. It cannot prevent sexually-transmitted diseases. Definition Venereal diseases which are... View Article
What causes winds?
Uneven heating of the Earth’s surface causes winds. On being heated, the air becomes lighter and rises. As a result,... View Article
What are weeds? How can we control them?
The undesirable plants that grow along with the crops are called weeds. These weeds, feed on the nutrients provided to... View Article
What are villi? What is their location and function?
Definition The tiny projections on the inner surface of the small intestine which help in absorbing the digested food are... View Article
What are fossils? What do they tell us about the process of evolution?
The preserved remains of animals or plants or other organisms from the distant past are called fossils. These fossils tell... View Article
What do you understand by barchans?
Crescent-shaped sand dunes
What are antibiotics? What precautions must be taken while taking antibiotics?
Antibiotics are medicines produced by certain micro-organisms to kill other disease-causing micro-organisms. Definition of antibiotics Antibiotics are antimicrobial drugs obtained... View Article
Is water a Lewis base?
Lewis base due to unshared electron pair on Oxygen.
What are virtual images?
Virtual image forms when rays of light do not actually meet, but appear to meet when produced backwards.
Which of the following is an antibiotic (i) Sodium bicarbonate (ii) Streptomycin (iii) Alcohol (iv) Yeast
Answer: (ii) Streptomycin Antibiotics are antimicrobial drugs obtained from other organisms such as moulds, fungus, and soil bacteria to combat... View Article
What is the working principle of transformer?
Answer: A transformer is a device used in the power transmission of electric energy. The transmission current is AC. It... View Article
What are wavelength, frequency, time period and amplitude of a sound wave?
a) Wavelength: The distance between two consecutive compressions or two consecutive rarefactions is known as the wavelength. Its SI unit... View Article
Give an example of compound which has cyclic trimer structure
Solid SO3 exists as cyclic trimer structure.
What is the nature of silicon dioxide?
Silicon dioxide is covalent in nature
