Nuclear membrane is the outer membrane of the nucleus that allows the movement of materials between the nucleus and cytoplasm. It does not provide flexibility to the cell.

The movement of water from a region of higher concentration to a region of lower concentration through a semipermeable membrane is called osmosis.

Bacteria are called prokaryotes as they do not have a well-defined nuclear membrane around the nucleus of their cell.

Prokaryotes are unicellular organisms with an undefined nucleus.

White blood cells are amoeboid in shape as they can change their shape.

Blood cells are spherical in shape, nerve cells are long and elongated, whereas muscle cells and cardiac cells are spindle-shaped.

Nucleolus is a spherical-shaped structure present in the nucleus of a cell.

Cell was discovered by Robert Hooke in 1665 under a simple magnifying device from a thin slice of cork. These were dead cells.

The thread-like structures present in the nucleus are called chromatins. They condense at the time of cell division and form chromosomes.

Among the following, muscle cell is spindle-shaped.

Nucleus is present in the centre of an animal cell and it appears as a dense body under the microscope.

The process of movement of gases from the region of high concentration to low concentration is called diffusion. It helps in the gaseous exchange between the cell and its outer environment.

Protoplasm is called the living substance of the cell.

An egg cell of hen can be seen with naked eyes.

Robert Hooke assigned the term 'cell'  to the compartments which he saw under a magnifying device.