Is there any relationship between the size of an organism and its lifespan? Give two examples to support your answer.

In bacteria,fungi,and lower plants,various thick-walled $A$ are formed,which help them to survive $B$ conditions; these germinate on the availability of a suitable environment. In higher plants,$C$ and some other vegetative reproductive structures serve as means to tide over periods of stress besides helping in dispersal; they germinate to form new plants under favourable moisture and temperature conditions. Choose the correct option for $A, B$,and $C$.

Examine the figures $A, B, C,$ and $D$ given below and select the right option for female sex organs.

Why is reproduction essential for organisms? Describe its types.

In diploid organisms,the gamete-producing cells are called:

Which type of stimulus is used to achieve parthenogenic development?