Write two similarities and one dissimilarity between mitochondria and plastid.

Draw a neat diagram of a plant cell and label any three parts which differentiate it from an animal cell.

Why are lysosomes also known as 'scavengers of the cells'?

$(a)$ Name the organelle which provides turgidity and rigidity to the plant cell. Name any two substances which are present in it.
$(b)$ How are they useful in unicellular organisms?

$A$ cell will swell up if

Name the organelles which show the analogy written as under:
$(a)$ Transporting channels of the cell ..........
$(b)$ Power house of the cell ............
$(c)$ Packaging and dispatching unit of the cell ...........
$(d)$ Digestive bag of the cell ...........
$(e)$ Storage sacs of the cell ...........
$(f)$ Kitchen of the cell .............
$(g)$ Control room of the cell ..........