$A$ bacterial cell divides every $1$ minute. It takes $15$ minutes for a cup to be one-fourth full. How much time will it take to fill the cup?

Binary fission is found in

Between an annual and a perennial plant,which one has a shorter juvenile phase? Give one reason.

The given figure shows gametes. Select the correct option.

Choose the correct option for asexual and sexual reproduction in organisms that have a relatively simple organization.

Feature	Asexual reproduction	Sexual reproduction
$(a)$ Condition	Favourable	Unfavourable
$(b)$ Occurrence	More	Less
$(c)$ Structures	Spore	Gamete
$(d)$ Division	Meiosis	Mitosis

Choose the correct options from the following:
$I$. Annual and biennial plants show clear-cut vegetative,reproductive,and senescent phases.
$II$. Bamboo species flower only once in their life,generally after $50-100$ years.
$III$. $Strobilanthus$ $kunthiana$ is a monocarpic plant which flowers only once after $12$ years.