What is pollen pistil interaction? How it is mediated?
Pollen-pistil interaction is a productive process comprising the identification of pollen followed by promotion or inhibition of the pollen. This... View Article
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Which one of the following is an artificial ecosystem? (a) Pond (b) Crop field (c) Lake (d) Forest
Answer: option (b) A crop field is an artificial ecosystem that is man-made. Artificial Ecosystem The ecosystem made by man for... View Article
Give 4 points on affinities of sphenodon.
1. Sphenodon has a lizard like body and is about 2 feet long and the tail measures about 1/3rd of... View Article
Draw neat and labelled diagram of human digestive system.
https://cdn1.byjus.com/wp-content/uploads/2018/01/human-digestive-system.jpg
Name any one heterocrine gland.
The pancreas is one heterocrine gland.
The scientific name of mango is written as Mangifera Indica L. Pickup the correct statement about the significance of the letter ‘L’.
The letter ‘L’ in Mangifera Indica L signifies the taxonomist, Linnaeus.
Power supplied to a particle of mass 2 kg varies
The velocity of particle at time t = 2 s will be 2 m/s.
Atmospheric pressure is measured by
Atmospheric pressure is measured by a barometer.
A 40 kg slab rests on a frictionless floor a 10 kg block rests on
A 40 kg slab rests on a frictionless floor. A 10 kg block rests on top of the slab. The... View Article
A cyclotron is used to accelerate _____. (a) only negatively charged particles (b) only positively charged particles (c) both negatively and positively charged particles (c) Neutrons
Answer: (c) both negatively and positively charged particles A cyclotron is used to accelerate both negatively and positively charged particles.... View Article
While charging the lead storage battery
While charging the lead storage battery a) PbSO4 on cathode is reduced to Pb b) PbSO4 on anode is oxidised... View Article
Development activities on the hydrosphere cause
Answer: a) Water Pollution Development activities on the hydrosphere cause Water Pollution.
Give an example of isolated system.
A perfectly insulated, rigid and closed vessel is an example of an isolated system as neither mass nor energy can... View Article
Explain why the core of an electromagnet should be of soft iron and not of steel.
The core of an electromagnet should be of soft iron because soft iron loses all its magnetism when the current... View Article
Which of the following is not correctly matched?
Ammeter Voltmeter Resistor Battery Answer: The electrical symbol of a resistor is not correctly matched. A resistor is represented as... View Article
What is the SI unit of charge?
The SI unit of charge is Coloumb.
Myopia can be corrected by using which lens?
Myopia can be corrected by using concave lens.
Dimensions of frequency are
The dimensions of frequency or the dimensional formula of frequency is given by [M0 L0 T1].
What is the effect of gravity on fluid pressure?
The effect of gravity on fluid pressure is that it will cause the fluid body to move in the direction... View Article
Angle of dip is 90° at
The angle of dip is 90° at poles. The magnetic lines of forces are perpendicular to the surface at the... View Article
