Question

Choose the option which correctly depicts the biological levels of organisation.

• A. Cell $\to$ Tissue $\to$ Organ system $\to$ Organ $\to$ Organism
• B. Cell $\to$ Tissue $\to$ Organ $\to$ Organ system $\to$ Organism
• C. Organ system $\to$ Organ $\to$ Tissue $\to$ Cell $\to$ Organism
• D. Cell $\to$ Organ $\to$ Tissue $\to$ Organ system $\to$Organism

Answer 1

The correct option is B Cell $\to$ Tissue $\to$ Organ $\to$ Organ system $\to$ Organism

$\bullet$ The cell is the basic unit of life.
$\bullet$ Cells that have a similar function form a tissue.
$\bullet$ The tissues group together to form organs and a number of organs together form an organ system.
$\bullet$ Many organ systems together form an organism. Eg: Stomach cells form a tissue in it.
$\bullet$ These tissues form the organ, stomach.
Stomach, intestine and various other organs join to form the digestive system.
$\bullet$ Digestive system, excretory system, respiratory system, etc., together form an organism.