Practice questions covering flowering plants (angiosperms) and the alternation of generations in plant life cycles, including reproductive structures.
George Bentham and Joseph Dalton Hooker proposed the natural classification system for flowering plants, considering both external and internal features.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Angiosperms and Plant Life Cycles - Alternation of Generations
The plant body of liverworts, such as Marchantia, is thalloid and dorsiventral, appressed to the substrate.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Angiosperms and Plant Life Cycles - Alternation of Generations
Gymnosperms have exposed ovules, functionally similar to angiosperm ovules but without an ovary wall.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Angiosperms and Plant Life Cycles - Alternation of Generations
The sporophyte in liverworts is simple, differentiated into foot, seta, and capsule, not a complex leafy structure.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Angiosperms and Plant Life Cycles - Alternation of Generations
The gametophyte in pteridophytes is a small, free-living structure called prothallus.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Angiosperms and Plant Life Cycles - Alternation of Generations
The primary endosperm nucleus in angiosperms is triploid (3n) due to the fusion of a male gamete with two polar nuclei.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Angiosperms and Plant Life Cycles - Alternation of Generations
The gametophyte in bryophytes is thallus-like and may possess root-like, leaf-like, or stem-like structures.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Angiosperms and Plant Life Cycles - Alternation of Generations
In pteridophytes, the spore germinates to form the gametophyte (prothallus).
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Angiosperms and Plant Life Cycles - Alternation of Generations
The megasporophyll in gymnosperms bears ovules, similar to how an ovary bears ovules in angiosperms.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Angiosperms and Plant Life Cycles - Alternation of Generations
The gametophyte is the dominant, photosynthetically active, and independent phase in bryophytes.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Angiosperms and Plant Life Cycles - Alternation of Generations
The protonema is the first stage in moss development, emerging directly from the spore.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Angiosperms and Plant Life Cycles - Alternation of Generations
The sporophyte in liverworts is not free-living; it is attached to the gametophyte and derives nourishment from it.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Angiosperms and Plant Life Cycles - Alternation of Generations
