The cytoplasm and nucleus are enclosed within the cell membrane, also called plasma membrane. The membrane separates cells from one another and also cells from the surrounding medium.
It is porous and allows the movement of substances or materials both inwards and outwards.

In hen's egg a white material surrounds the yellow part. White material is albumin and yellow part is yolk. They are part of a single cell.

An organism with billions of cells begins life as a single cell which is the fertilized egg. This fertilized egg cell multiplies and the number of cells increases as development proceeds.

Yes, egg of hen represents a single cell and is big enough to be seen by the unaided eye.

Pseudopodia (pseudo-false; podia-feet) are finger-like projections of varying length protruding out of the body of Amoeba. These can appear or disappear as Amoeba moves or feeds. It helps in movement and in capturing food.

In the given structure mushroom and beetle have been classified wrongly because mushroom is a multicelled organism and beetle is a Single celled organism.

Scientists observe and study the living cells by using highly magnifying microscopes.

Plastids (i.e. chromoplasts) causes the red colour in tomatoes.

Cell wall is an additional layer surrounding the plasma membrane that protects cells against variations in temperature, moisture and high wind speed. It also provides shape and rigidity to cells.

Amoeba is a cell that behaves like a complete organism.

Animal cells do not have a cell wall around them.

Yes, both are living organisms, made up of cell.

The change in shape of Amoeba is due to formation of finger-like cytoplasmic projections thatare called pseudopodia. Amoeba captures foodand moves by changing its shape.