(N/A) The comparison of reproductive structures across these plant groups can be summarized as follows:
$1$. Male Reproductive Organs:
- Angiosperms: The stamen consists of an anther and a filament,which produces microspores (pollen grains).
- Pteridophytes: The antheridium produces male gametes (antherozoids).
- Gymnosperms: The male cone (strobili) consists of microsporophylls bearing microsporangia,which produce microspores.
$2$. Female Reproductive Organs:
- Angiosperms: The carpel (pistil) consists of stigma,style,and ovary containing ovules,which house the egg cell.
- Pteridophytes: The archegonium is the female sex organ that produces the egg cell.
- Gymnosperms: The female cone (strobili) consists of megasporophylls bearing ovules,which contain the female gametophyte and egg cell.