How do you differentiate between capture fishing, mariculture and aquaculture?
Capture fishing | Mariculture | Aquaculture |
---|---|---|
It is one of the most common forms of fishing. It is a type of fishing where the fishes are obtained from natural resources like rivers, lakes or seas . | Fish farming or culture fishing in marine waters is called mariculture. Varieties like tuna and prawns are cultivated in this method. | Fish culture done in brackish water where seawater and freshwater mix together is known aquaculture. |
How do good animal husbandry practices benefit farmers?
Explain any one method of crop production which ensures high yield.
What are the desirable characters of bee varieties suitable for honey production?
How do plants get nutrients?
How are fish obtained?
What is genetic manipulation? How is it useful in agricultural practices?
What are the desirable agronomic characteristics for crop improvements?
What factors may be responsible for losses of grains during storage?
Which method is commonly used for improving cattle breeds and why?
How do biotic and abiotic factors affect crop production?
Which of the following has more inertia: (a) a rubber ball and a stone of the same size? (b) a bicycle and a train? (c) a five-rupees coin and a one-rupee coin?
State the universal law of gravitation.
Which of the following are matter?
Chair, air, love, smell, hate, almonds, thought, cold, cold-drink, smell of perfume.
A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (Fig. 11.3). Let us take it that the force acts on the object through the displacement. What is the work done in this case?
What is meant by a pure substance?
How does the sound produced by a vibrating object in a medium reach your ear?
In a reaction, 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium observations are in agreement with the law of conservation of mass.
sodium carbonate + ethanoic acid → sodium ethanoate + carbon dioxide + water
What are canal rays?
State any two conditions essential for good health.
How is our atmosphere different from the atmospheres on Venus and Mars?
How many times did you fall ill in the last one year? What were the illnesses?
(a) Think of one change you could make in your habits in order to avoid any of/most of the above illnesses.
(b) Think of one change you would wish for in your surroundings in order to avoid any of/most of the above illnesses.
How is our atmosphere different from the atmospheres on Venus and Mars?
Will advanced organisms be the same as complex organisms? Why?
A pair of bullocks exerts a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field?
What does a neuron look like?
Draw a labelled diagram of a neuron.
What do you mean by buoyancy?
Write the electronic configuration of any one pair of isotopes and isobars.
Explain, why is it difficult for a fireman to hold a hose, which ejects large amounts of water at a high velocity.
How do poriferan animals differ from coelenterate animals?