Which of the following plant groups produces seeds but is non-flowering?

Which of the following is a characteristic of a prokaryotic organism?

When a big drop of water is formed from $n$ small drops of water,the energy loss is $3E$,where $E$ is the energy of the bigger drop. If $R$ is the radius of the bigger drop and $r$ is the radius of the smaller drop,then the number of smaller drops $(n)$ is:

Which one of the following precedes the re-formation of the nuclear envelope during the $M$ phase of the cell cycle?

If $a \neq 0, b \neq 0, c \neq 0, a \times b = 0$ and $b \times c = 0$, then $a \times c$ is equal to

Which feature is inconsistent with the haplontic life cycle?