Which of the following is the world's most problematic aquatic weed?

Which plant loses its economic utility if its fruits are produced by induced $..........$?

Identify the incorrect statement.

In which of the following organisms does the formation of the zygote $NOT$ occur inside the body?

Contrivances for self-pollination are:

Which of the following processes occur simultaneously?
$(i)$ Ovule $\rightarrow$ Seed
$(ii)$ Ovary $\rightarrow$ Fruit
$(iii)$ $MMC$ $\rightarrow$ Megaspore
$(iv)$ $PMC$ $\rightarrow$ Pollen grain