The best material for demonstrating streaming movement of protoplasm within living cells is

Which of the following is an incorrect pair?

In the given figure,what do the labeled parts 'a' and 'b' represent respectively?

In which of the following are Golgi bodies absent?

How many statements are correct?
$(A)$ Animal cells contain membrane-bound organelle called centriole which help in cell division.
$(B)$ Lipids are arranged within the plasma membrane with the polar head towards the inner sides and the hydrophobic tails towards the outer side.
$(C)$ The cell wall and middle lamellae may be traversed by plasmodesmata which connect the cytoplasm of neighboring plant cells.
$(D)$ The quasi-fluid nature of lipid enables lateral movement of proteins within the overall bilayer.

Column-$I$ represents the organelle and Column-$II$ represents its structure. Select the correct option:

Column-$I$	Column-$II$
$(A)$ Mitochondria	$(i)$ Single membrane-bound structure
$(B)$ Lysosome	$(ii)$ Non-membrane-bound structure
$(C)$ Nucleolus	$(iii)$ Double membrane-bound structure