Question
Write short note: Blue Revolution.
✓
Answer
- Utilization of aquaculture practices for obtaining edible and commercial aquatic organisms is called blue revolution.
- In East Asian countries where water bodies and fish population is abundant, the aquaculture was started.
- On similar lines, in India, the aquaculture of different fresh water and marine organisms is being done with the help of fishery scientists.
- Government of India has vowed to increase the aquaculture production by encouraging the people for aquaculture by launching the program ‘Nil- Kranti Mission-2016’ (NKM-16).
- Pisciculutre is culturing of fish, mariculture is culture of marine organisms such as prawns/shrimps and lobsters. Sea weeds, oysters, clams are also cultured.
- For carrying out aquaculture, 50% to 100% subsidies are offered by the Government.
- Fresh water fishes like rohu, catla and other edible varieties like shrimp and lobsters are being cultured on a large scale which can bring about Blue Revolution.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Distinguish between Direct current and alternating current.
Draw all possible structural formulae having molecular formula $\mathrm{C}_6 \mathrm{H}_{14}$. Give names to all the isomers.
→When a person puts food in his mouth, then teeth cut it into small pieces, chew and grind it. The glands A in the mouth secrete a substance B which is mixed with the food by tongue. The substance B contains an enzyme C which starts the digestion of food in the mouth. The slightly digested food from the mouth goes down a tube D. The special type of movements E in the walls of tube D push the food into stomach for further digestion. The stomach wall secretes gastric juice containing three substance F, G and H. One of the functions of F is to kill bacteria which may enter the stomach with food. The substance G protects the inside layer of stomach from the damaging effect of substance F whereas substance H is and enzyme for digestion. The partially digested food then enters into small intestine for further digestion.
- What is Gland A, Substance B and Enzyme C?
- Name the tube D.
- What is the movement E known as?
- What are F, G and H?
An object thrown vertically upwards reaches a height of 500 m . What was its initial velocity? How long will the object take to come back to the earth? Assume $g =10 m / s ^2$
→Explain the following:
What is the role of the anomalous behaviour of water in preserving aquatic life in regions of cold climate?
What is the role of the anomalous behaviour of water in preserving aquatic life in regions of cold climate?
When an object made of metal A is kept in air for a considerable time, it loses its shine and becomes almost black due to the formation of a layer of substance B. When an object made of another metal C is kept in damp air for a considerable time, it gets covered with a green layer of substance D. Metal A is the best conductor of electricity whereas metal C is the next best conductor of electricity.
- What is metal A?
- What is metal C?
- Name the substance B.
- Name the substance D.
- What type of chemical can be used to remove the green layer from metal C and clean it? Why?
A colourless organic liquid $X$ of molecular formula $C_2H_4O_2$ turns blue litmus to red. Another colourless organic liquid $Y$ of molecular formula $C_3H_6O$ has no action on any litmus but it is used as a nail polish remover. A yet another colourless organic liquid $Z$ of molecular formula $C_2H_6O$ has also no action on litmus but it is used in tincture of iodine.
→- Name the liquid $X.$ To which homologous series does it belong? Give the name of another member of this homologous series.
- Name the liquid $Y.$ To which homologous series does it belong? Write the name of another member of this homologous series.
- Can you name an organic compound having the same molecular formula as liquid $Y$ but which belongs to a different homologous series? What is this homologous series?
- Name the liquid $Z.$ To which homologous series does it belong? Write the name of another member of this homologous series.
What is forest fire? What is its effect on environment?
Explain the statement – ‘We have got this Earth planet on lease from our future generations and not as an ancestral property from our ancestors.’
Observe the figure and answer the following.
- Write the name of the method.
- What is used as anode and cathode in this method?
- Write the molecular formula and use of cryolite.
- Write anode reaction.
- Write cathode reaction.