MCQ
Spore of fern represents
- ASporophytic stage
- ✓Gametophytic stage
- CSporophytic and gametophytic stage
- DApomictic stage
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$I.$ In gymnosperms, the male and female gametophytes have an independent existence.
$II.$ The multicellular female gametophyte is retained within the megasporangium.
$III.$ The gymnosperms are heterosporous.
Of these statements

Reason : Essential amino acids can not be synthesized in the human body