কাজ
খাদ্যতালিকাগত এবং পুষ্টির থেরাপি, পুষ্টি সম্পূরক, পিতামাতার পুষ্টি চিকিৎসায় নির্দেশিত হয়।
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On which sea creature do the clown fish stay?
Clown fish stay in Tropical coral reefs
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On which sea creature do the clown fish stay?
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In evolutionary terms, can we say which among bacteria, spiders, fish and chimpanzees have a ‘better’ body design? Why or why not?
Evolution cannot always be equated with progress or better body designs. Evolution simply creates more complex body designs. However, this does not mean that the simple body designs are inefficient....
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A large number of fish are suddenly found floating dead on a lake. There is no evidence of toxic dumping but you find an abundance of phytoplankton.
The amount of dissolved oxygen present in water is limited. The abundance of phytoplanktons causes depletion of this dissolved oxygen. This is because, phytoplanktons are degraded by bacteria present in...
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How are fish obtained?
Fish can be obtained by two ways: (i) Capture fishing: It is the process of obtaining fish from natural resources. (ii) Culture fishery: It is the practice of farming fishes. Farming can...
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What are the advantages of composite fish culture?
An advantage of composite fish culture is that it increases the yield of fish. In a composite fish culture, five or six different species are grown together in a single...
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Which one is a true fish? (a) Jellyfish (b) Starfish (c) Dogfish (d) Silverfish
Which one is a true fish? (c) Dogfish
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Which is not an aquatic animal? (a) Hydra (b) Jelly fish (c) Corals (d) Filaria
Which is not an aquatic animal? (d) Filaria
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How can the two emulsions can be distinguished : (a) oil in water type (o/w) and (b) water in oil type (w/o)
[Hint : (a) By dilution test (b) By dye test]
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Fish breathe with the help of gills which are richly supplie with blood vessels. The gills help the fish to
(b) take in oxygen dissolved in water.
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