In which animal do haploid cells divide mitotically to produce gametes?

Which one of the following is $NOT$ a disadvantage of self-pollination?

Select the incorrect statement from the following.

How many times will meiosis take place for the formation of $80$ wheat grains?

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

Is the presence of a large number of chromosomes in an organism a hindrance to sexual reproduction? Justify your answer by giving suitable reasons.