Why the chances of survival of young ones is greater in viviparous ?

Identify the given figure :

During embryogenesis, zygote undergoes

Choose correct option ($T$ = true, $F$ = false).

- If zygote develops out side the body, the animal is oviparous.

- In flowering plants, zygote is formed inside the ovule.

- During embryogenesis, embryo show only cell differentiation.

- In flowering plants, the ovary develops into the fruit.

Which is correct sentence ?

Which of the following statements is incorrect ?
$(i)$ Bamboo species flower only once in their life time, generally after $50-100$ years and produce large number of fruits and die.
$(ii)$ In animals, the juvenile phase is followed by morphological and physiological changes prior to active reproductive behaviour.
$(iii)$ The reproductive phase is of same duration in all organisms.
$(iv)$ Juvenile phase is the period of growth between the birth of an individual till it reaches reproductive maturity.