Give reasons for the following : (e) Square is also a parallelogram.

Give reasons for the following : (d) Square, rectangles, parallelograms are all quadrilaterals.

Give reasons for the following : (c ) A Square can be thought of as a special rhombus.

Give reasons for the following : (a) A square can be thought of as a special rectangle.

Give reasons for the following : (b) A rectangle can be thought of as a special parallelogram.

Give reason for the following. Stability of colloids.

State the number of lines of symmetry for the following figures: A parallelogram

Give reason for the following : Bryophytes require water for reproduction.

Give reasons for the following : The blood vascular system in cockroach is considered as open type.