Explain the membrane present at the caudal end of the yolk sac.

Explain the egg membranes of human ovum.

What is the function of yolk sac?

Knob like appendages present at one end of the chromsome.

(A) Draw the embryo sac of a flowering plant and label (i) central cell (ii) chalazal end of the embryo sac and (iii ) synergids. (b) Name the cell that develops into the embryo sac and explain how this cell leads to the formation of embryo sac. Also mention the role played by the various cells of the embryo sac .

Write a note on Yolk Sac.

Double membrane pleural sac

Which membrane provides the medium for movement of the foetus? Explain it.

The number of bacteria in a certain culture doubles every hour. If there were 30 bacteria present in the culture originally, how many bacteria will be present at the end of 2^(nd) hour, 4^(th) hour and n^(th) hour?

The number of bacteria in a certain culture doubles every hour. If there were 30 bacteria present in the culture originally , how many bacteria will be present at the end of 2^(nd) hour , 4^(th) hour and n^(th) hour ?