Name the type of cells which undergo regeneration.

Would a Planaria cut vertically into two halves regenerate into two individuals? Complete Figure $D$ and $E$ by indicating the regenerated regions.

Why do we need to adopt contraceptive measures?

In asexual reproduction,two offsprings having the same genetic material and the same body features are called ......

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

$(a)$ Identify the organisms $A$ and $B$ and the mode of asexual reproduction exhibited by them.
$(b)$ How will an organism be benefitted if it reproduces through spores?
$(c)$ Mention the two asexual methods by which Hydra can reproduce. Explain briefly any one such method.