Which one of the following is a vital stain?

$A$ $1 \ ml$ pipette can contain about

Select the wrong statement from the following.

Select the correct match for $X$ and $Y$:

Column $X$	Column $Y$
$(1)$ Mitochondria	$(P)$ Suicide bags
$(2)$ Chloroplast	$(Q)$ Synthesis of steroids
$(3)$ Lysosome	$(R)$ Photosynthesis
$(4)$ Smooth Endoplasmic Reticulum	$(S)$ Powerhouse of the cell

You are asked to examine a cell using a powerful light microscope. The image you see has a clearly defined nucleus and mitochondria. It also has a large central vacuole and chloroplasts. From what group of organisms did this cell most likely come?

Which of the following represents the correct sequence of relative sizes in descending order?