The cells formed by repeated divisions of the zygote undergo ... to form tissues, organs, and organ systems.

Assertion $(A)$: Differentiation is a property of a living organism.
Reason $(R)$: Morphogenesis occurs during the process of development.

Which process results in the formation of tissue systems, organs, and organ systems in a developing embryo?

Living differentiated cells, that by now have lost the capacity to divide, can regain the capacity of division under certain conditions. This phenomenon is termed as $.........$.

Senescence as an active developmental cellular process in the growth and functioning of a flowering plant,is indicated in

Which of the following is formed after dedifferentiation?