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Biology
All India Exam - 2011
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Q5 of 56 Page 1

How does an embryo get nourishment inside the mother’s body?

The embryo gets nourishment inside the mother’s body by a disc-like tissue placenta which gets developed between the uterus well and the embryo during the implantation. The nutrients, Oxygen and waste products are exchanged through this tissue.


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3

Draw the structure of the hexanal molecule, .

4

Name the type of particles which act as prisms in the formation of rainbow in the sky.

7

(a) How does the size of atom of elements very down a group in the periodic table? Why is it so?

(b) What does the tendency to lose electrons vary down a group in the periodic table? Give reason.

10

What is a spectrum? Why do different coloured rays deviate differently on passing through a glass prism?

Questions · 56
All India Exam - 2011
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