Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
A scientist discovers a new species with the following characteristics: eukaryotic, multicellular, photosynthetic, lacks vascular tissue, exhibits alternation of generations with a dominant gametophyte. This organism MOST likely belongs to which plant group?
Pteridophyta
Bryophyta
Gymnosperms
Angiosperms
The development of the sporophyte without fertilization from the gametophytic tissue in some pteridophytes like Dryopteris is known as:
Apospory
Parthenogenesis
Apomixis
Apogamy
Which unique characteristic distinguishes the Selaginella stem anatomy from other pteridophytes?
Siphonostele
Protostele
Presence of trabeculae
Dictyostele
In heterosporous pteridophytes, the development of the male gametophyte predominantly occurs:
Within the megaspore wall
Outside the spore wall
Partially inside and outside the spore wall
Within the microspore wall
The suspensor in Selaginella plays a crucial role in:
Anchoring the gametophyte to the substrate
Protecting the developing sporophyte
Facilitating spore dispersal
Pushing the developing embryo into the nutritive tissue of the female gametophyte
Which of these characteristics is NOT associated with the evolution of heterospory in pteridophytes?
Reduction in the number of megaspores
Increased protection of the female gametophyte
Development of endosporic gametophytes
Increased dependence on water for fertilization
Explain the role of the annulus in fern sporangia, contrasting its function with the role of elaters in liverworts.
Both annulus and elaters aid in nutrient absorption.
The annulus protects the developing spores, while elaters facilitate fertilization.
The annulus aids in spore dispersal in ferns by a spring-like mechanism, while elaters in liverworts are hygroscopic and facilitate spore dispersal by changing shape with humidity.
Both annulus and elaters are involved in anchoring the plant to the substrate.
Which of the following is NOT a characteristic of the Pteridophytes?
Vascular tissue
Spores
Seeds
Independent sporophyte
Which of the following statements regarding the life cycle of Selaginella is INCORRECT?
The megaspores and microspores germinate to give rise to female and male gametophytes, respectively.
The development of the zygote into the embryo takes place within the female gametophyte, which is independent of the sporophyte.
The sporophyte is the dominant phase in the life cycle.
Selaginella exhibits heterospory.
Which of the following is NOT a characteristic feature of the Pteridophytes?
Presence of vascular tissues
Sporophyte as the dominant phase
Seeds enclosed in fruits
Independent gametophyte
