Light year is the unit of the (1) Distance (2) Time (3) Speed (4) Intensity of light
Answer: (1) Distance A light-year is a unit of distance. It is the distance a light photon travels in the... View Article
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What are the various parts of embryo a dicot seed?
Answer: The embryo is the most important part of a seed. It is diploid developed from the fertilized egg. All... View Article
Ginger is a stem which can be differentiated from root because it (1) Grows parallel to ground (2) Stores food (3) Lacks chlorophlly (4) Has nodes and internodes
Answer: (4) Ginger or Zingiber officinale is an example of underground stem or rhizome modifications which have nodes and internodes.
(a) State the laws of refraction of light. Give an expression to relate the absolute refractive index of a medium with speed of light in vacuum. (b) The refractive indices of water and glass with respect to air are 4/3 and 3/2 respectively. If the speed of light in glass is 2×10^8ms −1 , find the speed of light in (i) air, (ii) water.
Answer: (a) Refractive index is defined as the ratio of the speed of light in a vacuum to its speed... View Article
What is thermite Reaction? Explain its use and give equation.
Answer: The thermite reaction is an exothermic reaction between metal and metal oxide. For example the reaction between the aluminium... View Article
What is sound and how is it produced?
Answer: A sound is a vibration that propagates through a medium in the form of a mechanical wave travels in... View Article
A conjoint vascular bundle is one in which xylem and phloem are (1) Joined together (2) Separate (3) On same radius (4) On alternate radii
Answer: (1) Vascular bundles are also known as fascicle. They are the component of the vascular tissue system in the... View Article
Unit of electric power may also be expressed as: (1) Volt ampere (2) Kilowatt hour (3) Watt second (4) Joule second
Answer: (1) Volt ampere Volt Ampere- Unit of apparent power in an electric circuit. Power is expressed as P = V.I... View Article
Discuss the difference between birth rate and the death rate
Answer: The difference between the birth rate and death rate are given below. Birth rate Death rate Birth rate is a term used to describe the number of babies born per 1000 people annually in a population.... View Article
Life saving hormone is secreted by which gland (1) Adrenal gland (2) Hypothalamus gland (3) Pituitary gland (4) Thyroid gland
Answer: (1) The adrenal gland secretes the hormone which saves lives. The gland secretes three main hormones: epinephrine, norepinephrine and... View Article
What is a true solution? (1) Sugar solution (2) Blood (3) Starch (4) Ink
Answer: (1)Sugar solution Explanation True Solution is a homogeneous mixture of two or more materials with a particle size of... View Article
What is Totipotency?
Answer: Totipotency is a single cell’s capacity to divide and generate all the differentiated cells within an organism. Examples of... View Article
Explain the formation of energy bands in solids. On the basis of energy bands distinguish between a metal, a semiconductor and an insulator.
Answer: The band theory of solids is different from the others because the atoms are arranged very close to each... View Article
What is the meaning of Hypophysation ?
Answer: Hypophysation is a method used in the breeding of fishes. The technique of hypophysation employs the injection of the... View Article
What is the main component in cng?
Answer: The full form of CNG is Compressed Natural Gas. The main component in CNG is methane stored at high... View Article
Culms are the plants with (1) Erect stem (2) Creeper stem (3) Strong stem (4) All of the above
Answer: (1) A culm is the stem of an above -grounded aerial grass or sedge. It is derived from culms,... View Article
The outermost layer of the Earth is called (1) Crust (2) Mantel (3) Core (4) None of the above
Answer: (1) Crust Earth’s outermost layer is called Crust. The other layers of the earth are the mantel, outer and inner... View Article
Write the chemical formula for Calgon
Answer: Calgon (amorphous sodium polyphosphate) is sodium hexametaphosphate with the chemical formula Na(PO3)6.
What type of stem modification found in Zaminkand?
Answer: The stem modification found in Amorphophyllus (Zaminkand) is corm. The underground stem grows vertically. Its shape is cylindrical. It... View Article
Who discovered the AB blood group?
Answer: Landsteiner was awarded the Nobel Prize in Physiology or Medicine in 1930 for his work on the ABO blood... View Article
