(a) How many paris of chromosomes do hum...

(a) How many paris of chromosomes do human beings have , specify the types of chromosomes also ?
(b) How is the sex of the child determined in human beings ?

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MBD -HARYANA BOARD-NEW STYLE MODEL TEST PAPER - 2-SET - D(SECTION -C ( LIFE SCIENCE ))

What is the name given for replenishment of forest ?
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Which elements is used in the synthesis of proteins?
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Growing foetus derives nutrition from mother's blood through
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is not a biodegradable pollutant.
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One cell - thick vessels are called :
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Give one advantage and one disadvantage of ozone .
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Name is better recycle or reuse ? Give reason with example.
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Name two plants that are growth by vegetative propagation.
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What term did Mendel use for genes ? Where are the genes located ...
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(a) How many paris of chromosomes do human beings have , specify the ...
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(a) Name the blood vessel that brings oxygenated blood to the hum...
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