$A$ bacterium divides every $35$ minutes. If a culture containing $10^5$ cells/ml is grown for $175$ minutes,what will be the cell concentration/ml after $175$ minutes?

In which of the following is external fertilization observed?

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 $C$.

Which process leads to an increase in the number of organisms?

Match the following organisms with their approximate life spans:

Column-$I$	Column-$II$
$A$. Elephant	$a$. $1 \text{ month}$
$B$. Fruit fly	$b$. $4 \text{ months}$
$C$. Rice plant	$c$. $7-15 \text{ days}$
$D$. Butterfly	$d$. $60-90 \text{ years}$

$A$ - In several fungi and plants,terms such as Homothallic and Monoecious are used to represent bisexual conditions.
$R$ - Dioecious is the term used to describe unisexual conditions.