MCQ
Vascular cambium produces.
- APrimary xylem and primary phloem.
- ✓Secondary xylem and secondary phloem.
- CPrimary xylem and secondary phloem.
- DSecondary xylem and primary phloem.
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$(a)$ Heterospory
$(b)$ Endosporic development of gametophyte
$(c)$ Reduced gametophyte
$(d)$ Localization of sporangium bearing appendages in strobili
$(e)$ Unisexual gametophytes
$(f)$ Fertilization with the help of water