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1.

What is reteroposons ?

Answer»

Retroposons are repetitive DNA fragments which are inserted into chromosomes after they had been reverse transcribed from any RNA molecule.  Retroposon is a fragment of DNA inserted into a chromosome following reverse transcription from RNA.
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2.

How much energy will be received by the 1st trophic level when hawk gets 1J of energy in the food chain consisting of mice,paddy,snake and hawk.a.1000b.10000c.100000d.1000000

Answer»
the question I quite wrong the order of food chain would be 
paddy _ mice _ snake _ hawk
thus snake have 10j as 1 *10
mice have 100 j as 10*10 
then finnaly paddy would have 1000j as 100*10
thankyou

I think the answer is (b) 10000joule

Food chain:-Grass-----Grass hopper-----Frog------snake-----hawk 
so according to the ten percent law if hawk get 1 joule then snake get 10 joule,frog get 100joule,grass hopper gets 1000joule and grass gets 10000 joule.

Thanku 
Answer by:- Keshav Jalan
I think it might be helpful!
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