Which of the following is an artificial method of vegetative propagation?

Differentiate between the following:
$(a)$ Pollen tube and Style
$(b)$ Fission in Amoeba and Plasmodium
$(c)$ Fragmentation and Regeneration
$(d)$ Bud of Hydra and bud of Bryophyllum
$(e)$ Vegetative propagation and Spore formation.

Characters that are transmitted from parents to offspring during reproduction show

In the process of grafting,what is the term for the rooted plant part that is fixed in the soil?

Name the life process of an organism that helps in the growth of its population.

During adolescence,several changes occur in the human body. Mark one change associated with sexual maturation in boys.