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Floating a needle on water
Thoroughly dry a steel needle. Place it on the tines of a dinner fork and gently smash the surface of the water in a dish with the fork. If you are careful the needle will float as you take the fork away. Look at the water surface closely. Can you see how the surface film seems to curve under the weight of the needle ?
Why are nematodes agriculturally very important? Nematodes are the abundant soil microfauna. Being predatory and saprophytic in nature they cause a loss of vigour of the root
A solid compound whose internal structural pattern is expressed as plane faces that can be seen with the unaided eye is generally called as a: Crystal
this is a sticky substance that traps dust from the inhaled air
Examining sand with a magnifying glass Study a small amount of sand with a magnifying glass or under the low power of a microscope if there is single available. The nearly colo
types of neuron according to function
What is the only usual mineral to be strongly magnetic other than magnetite: Pyrrhotite
INTRODUCTION : This exercise is based on here 'Laws and Regulations' of this course. What are we going to do in this exercise? - This might be the question arising in your mind. I
Botany: In the Bronze and the Iron Ages, agriculture became the principal mode of production of man in all lands. It is, thus, not surprising that in India, botany and elementa
what are the systems that are affected by asthma
can u explain me about ovaries and testes
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