Latest questions in this category.
Phylogenetic classification considers evolutionary relationships to group organisms.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Pteridophytes - Structure and Life Cycle
Leafy liverworts have tiny leaf-like appendages arranged in two rows on stem-like structures.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Pteridophytes - Structure and Life Cycle
Not all pteridophytes have macrophylls; some, like Selaginella, have small microphylls.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Pteridophytes - Structure and Life Cycle
In pteridophytes, sporangia are borne on leaf-like appendages called sporophylls.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Pteridophytes - Structure and Life Cycle
Pteridophytes require water for the transfer of male gametes (antherozoids) to the female gametophyte (archegonium).
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Pteridophytes - Structure and Life Cycle
The sporophyte in pteridophytes is diploid and dominant, not haploid.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Pteridophytes - Structure and Life Cycle
Psilotum, known as a "living fossil," has a primitive vascular system and is one of the simplest vascular plants.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Pteridophytes - Structure and Life Cycle
In Selaginella, the ligule, a small outgrowth on the leaf base, plays a role in retaining moisture, helping the plant survive dry conditions.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Pteridophytes - Structure and Life Cycle
Selaginella is a heterosporous pteridophyte that produces both microspores and megaspores, a key step toward seed evolution.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Pteridophytes - Structure and Life Cycle
Gymnosperm pollen grains often have wing-like structures (air sacs) to facilitate wind dispersal.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Pteridophytes - Structure and Life Cycle
In pteridophytes, the strobilus is a compact structure of sporophylls that bears sporangia, analogous to flowers in seed plants.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Pteridophytes - Structure and Life Cycle
Heterosporous pteridophytes produce two types of sporesâmicrospores (male) and megaspores (female)âresulting in unisexual gametophytes.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Pteridophytes - Structure and Life Cycle
