Showing 271–276 of 276 questions
Pteridophytes first acquired which adaptation for terrestrial life?
A
Seeds
B
Vascular tissue
C
Flowers
D
Cuticle
Correct Answer:
B. Vascular tissue
EXPLANATION
Pteridophytes were the first plants to develop true vascular tissue (xylem and phloem), allowing them to grow taller and transport water efficiently.
The spore-bearing structure in Riccia (a liverwort) is called:
A
Sporangium
B
Sporophyte
C
Capsule
D
Strobilus
Correct Answer:
C. Capsule
EXPLANATION
In bryophytes like Riccia, the capsule is the sporophyte that produces spores. It remains embedded in the gametophyte.
Which structure in bryophytes prevents water loss?
A
Rhizoids
B
Cuticle
C
Stomata
D
Xylem vessels
Correct Answer:
B. Cuticle
EXPLANATION
Bryophytes have a waxy cuticle that reduces water loss, though it's not as effective as in higher plants due to absence of stomata.
The dominant gametophytic generation is found in:
A
Gymnosperms
B
Angiosperms
C
Bryophytes
D
Pteridophytes
Correct Answer:
C. Bryophytes
EXPLANATION
In bryophytes, the gametophyte (moss plant) is dominant and independent, while the sporophyte depends on it for nutrition.
Bryophytes are considered the link between aquatic and terrestrial plants because:
A
They have true roots and stems
B
They require water for sexual reproduction
C
They have a waxy cuticle
D
They produce seeds
Correct Answer:
B. They require water for sexual reproduction
EXPLANATION
Bryophytes need water for fertilization as their sperms are motile. This characteristic links them to aquatic plants while they live on land.
Which of the following is NOT a characteristic of Kingdom Plantae?
A
Autotrophic nutrition
B
Cell wall made of cellulose
C
Heterotrophic nutrition
D
Presence of chloroplasts
Correct Answer:
C. Heterotrophic nutrition
EXPLANATION
Plants are autotrophic and perform photosynthesis. Heterotrophic nutrition is characteristic of animals and fungi, not plants.
