Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
The sporophyte of a certain bryophyte is completely dependent on the gametophyte. Microscopic examination of its cells reveals the presence of prominent plasmodesmata. Which of the following is LEAST likely to be true about this bryophyte?
It belongs to the class Anthocerotopsida.
Its sporophyte lacks stomata.
It is homosporous.
It reproduces asexually through fragmentation of the gametophyte.
Which characteristic is NOT shared by both the protonema of a moss and the filamentous stage of some green algae?
Presence of rhizoids
Photosynthetic capability
Filamentous structure
Haploid nature
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
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 feature distinguishes Gnetum from other gymnosperms and brings it closer to angiosperms?
Absence of archegonia
Presence of vessel elements in the xylem
Non-motile male gametes
Needle-like leaves
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 statement accurately describes the difference between the fascicular and interfascicular cambium?
Fascicular cambium produces secondary xylem, while interfascicular cambium produces secondary phloem.
Fascicular cambium is present in monocots, while interfascicular cambium is present in dicots.
Fascicular cambium arises within vascular bundles, while interfascicular cambium arises in the medullary rays.
Fascicular cambium is a primary meristem, while interfascicular cambium is a secondary meristem.
In plants exhibiting unusual secondary growth, like in Bougainvillea, the additional cambia arise from:
Residual procambium cells
Cells of the pith
Cells of the cortex or pericycle
Differentiated xylem parenchyma
Which of the following features is NOT exclusively found in the Rhodophyceae (Red Algae)?
Presence of chlorophyll a
Storage of floridean starch
Absence of flagella in the life cycle
Phycoerythrin pigment
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
