Which of the following is NOT a characteristic of Kingdom Plantae?
Answer: C
Plants are autotrophic and perform photosynthesis. Heterotrophic nutrition is characteristic of animals and fungi, not plants.
Q.2Easy
Bryophytes are considered the link between aquatic and terrestrial plants because:
Answer: B
Bryophytes need water for fertilization as their sperms are motile. This characteristic links them to aquatic plants while they live on land.
Q.3Easy
The dominant gametophytic generation is found in:
Answer: C
In bryophytes, the gametophyte (moss plant) is dominant and independent, while the sporophyte depends on it for nutrition.
Q.4Medium
Which structure in bryophytes prevents water loss?
Answer: B
Bryophytes have a waxy cuticle that reduces water loss, though it's not as effective as in higher plants due to absence of stomata.
Q.5Medium
The spore-bearing structure in Riccia (a liverwort) is called:
Answer: C
In bryophytes like Riccia, the capsule is the sporophyte that produces spores. It remains embedded in the gametophyte.
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Q.6Medium
Pteridophytes first acquired which adaptation for terrestrial life?
Answer: B
Pteridophytes were the first plants to develop true vascular tissue (xylem and phloem), allowing them to grow taller and transport water efficiently.
Q.7Medium
In ferns, the photosynthetically active independent structure is:
Answer: B
The prothallus is the gametophyte of ferns - a small, green, heart-shaped structure that is photosynthetically active and independent.
Q.8Easy
The arrangement of sporangia in ferns is called a:
Answer: A
A sorus (plural: sori) is a cluster of sporangia found on the underside of fern fronds, typically covered by an indusium.
Q.9Medium
Which of the following is a seedless vascular plant?
Answer: B
Selaginella is a pteridophyte - it has vascular tissue but reproduces via spores, not seeds. Pinus is a gymnosperm with seeds.
Q.10Easy
Gymnosperms are characterized by:
Answer: B
Gymnosperms (Conifers, Cycads, Ginkgo) have seeds exposed on cone scales without floral structures or fruit coverings.
Q.11Medium
The male gametophyte in gymnosperms is represented by:
Answer: A
In gymnosperms, the pollen grain is the male gametophyte. It contains generative and vegetative nuclei before pollination.
Q.12Medium
Which gymnosperms have motile sperms?
Answer: D
Cycas and Ginkgo retain the primitive character of motile sperms, while other gymnosperms like Pinus have non-motile sperm.
Q.13Medium
The female gametophyte in angiosperms is:
Answer: B
The embryo sac represents the female gametophyte in angiosperms, typically containing 8 nuclei in a 7-celled structure (Polygonum type).
Q.14Hard
Double fertilization in angiosperms involves:
Answer: C
Double fertilization: one sperm fuses with egg nucleus → zygote (diploid); second sperm fuses with central cell → endosperm (triploid). Unique to angiosperms.
Q.15Medium
Phloem tissue in angiosperms is characterized by the presence of:
Answer: B
Sieve tube elements and companion cells are the conducting and supporting elements of phloem tissue in angiosperms for translocation of organic solutes.
Q.16Hard
The most advanced characters of angiosperms include all EXCEPT:
Answer: D
Angiosperms have stationary male gametes (non-motile sperm). Motile sperms are primitive characters found in bryophytes and some gymnosperms.
Q.17Hard
Which of the following statements about spores and seeds is CORRECT?
Answer: B
Spores are haploid products of meiosis; seeds contain a diploid embryo, endosperm, and seed coat. Seeds are more advanced structures for dispersal.
Q.18Hard
The most recent evolutionary advancement in plant kingdom is:
Answer: C
Flowers and fruits are the most recent evolutionary advancements (approximately 140-150 million years ago), making angiosperms the most evolved plants.
Q.19Easy
Which of the following characteristics distinguishes bryophytes from pteridophytes?
Answer: B
Bryophytes lack true roots, stems, and vascular tissue, while pteridophytes possess true vascular tissue (xylem and phloem) and roots.
Q.20Easy
In mosses, the dominant generation is:
Answer: B
Mosses exhibit alternation of generations with the gametophyte (haploid) being the dominant, photosynthetic generation, while sporophyte is dependent.
