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
Which of the following statements regarding the development of the male gametophyte in Pinus is INCORRECT?
Microspore is the first cell of the male gametophyte.
The prothallial cell eventually degenerates.
The generative cell directly develops into the sterile cell and two male gametes.
A tube cell and a generative cell are formed after the first mitotic division of the microspore.
In gymnosperms, the ovule is considered naked because:
It lacks an integument.
It is not enclosed within an ovary.
It is exposed before fertilization.
It lacks a megasporangium.
Which feature distinguishes Gnetum from other gymnosperms and aligns it more closely with angiosperms?
Absence of archegonia
Presence of vessels in the xylem
Naked ovules
Wind pollination
The 'polyembryony' observed in some gymnosperms like Pinus refers to:
The development of multiple seeds within a single cone.
The development of multiple embryos within a single ovule.
The fusion of multiple male gametes with a single egg cell.
The development of multiple archegonia within a single ovule.
Which of the following gymnosperms does NOT possess motile sperm?
Cycas
Ginkgo
Pinus
Gnetum
In gymnosperms, the megaspore mother cell undergoes:
Mitosis to form two megaspores, both of which are functional.
Meiosis to form four megaspores, all of which are functional.
Meiosis to form four megaspores, of which one is functional.
Mitosis to form four megaspores, of which three are functional.
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 gymnosperm exhibits a unique fertilization mechanism involving a pollen tube that grows towards the archegonia but does NOT directly discharge the male gametes into the archegonium?
Pinus
Cycas
Gnetum
Cedrus
The 'coralloid roots' of Cycas have a symbiotic association with:
Mycorrhizae
Nitrogen-fixing bacteria
Nitrogen-fixing cyanobacteria
Endophytic fungi
