Govt Exams
A sorus (plural: sori) is a cluster of sporangia arranged on the abaxial surface of fern leaves, often covered by an indusium for protection.
Presence of archegonia, independent dominant gametophyte, and absence of true roots are distinctive features of bryophytes including mosses and liverworts.
The ovule arises as an outgrowth from the placenta (megasporophyll) and projects into the ovary cavity.
The prothallus is the free-living, independent, heart-shaped gametophytic generation in ferns that produces archegonia and antheridia.
Naked ovules (not enclosed in ovary) and cone formation are characteristic features of gymnosperms. Angiosperms have ovules enclosed in the ovary.
The gametophyte generation is always haploid (n) because it develops from spores after meiosis and produces gametes through mitosis.
Gymnosperms possess the most advanced vascular tissue with secondary growth, vessels in some species, and efficient water transport mechanisms compared to other groups.
Monocots have ONE cotyledon, not two. Two cotyledons is a characteristic feature of dicots. Options A, B, and C are all typical monocot features.
The micropyle is a small opening in the integument through which the pollen tube enters the ovule to reach the embryo sac for fertilization.
The most definitive character for embryo classification is the number of cotyledons: monocots have one, dicots have two. This is evident even at the embryonic stage.