Q11. Which plant division includes plants that commonly grow in aquatic environments, with some members forming extensive floating mats?
a) Bryophyta
b) Pteridophyta
c) Gymnosperms
d) Angiosperms
Correct Answer: a) Bryophyta
Explanation: Bryophyta, such as certain species of mosses, liverworts, and hornworts, commonly grow in aquatic environments. Some species can form extensive floating mats in ponds or marshes.
Q12. Which plant division is characterized by having a dominant sporophyte generation and a reduced, dependent gametophyte generation?
a) Bryophyta
b) Pteridophyta
c) Gymnosperms
d) Angiosperms
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Correct Answer: d) Angiosperms
Explanation: Angiosperms typically have a dominant sporophyte generation, which is the visible plant, while the gametophyte generation is reduced and dependent, usually existing within the flower or seed.
Q13. Which plant division includes plants that reproduce via seeds enclosed within a structure called a cone?
a) Bryophyta
b) Pteridophyta
c) Gymnosperms
d) Angiosperms
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Correct Answer: c) Gymnosperms
Explanation: Gymnosperms reproduce via seeds that are not enclosed within a fruit. Instead, they are typically found on the surface of cone-like structures, hence the name “gymnosperms,” meaning “naked seeds.”
Q14. Which plant division includes plants commonly known as seedless vascular plants?
a) Bryophyta
b) Pteridophyta
c) Gymnosperms
d) Angiosperms
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Correct Answer: b) Pteridophyta
Explanation: Pteridophyta, or ferns and their allies, are referred to as seedless vascular plants because they possess vascular tissues for water and nutrient transport but reproduce via spores, not seeds.
Q15. Which plant division is characterized by having a well-developed vascular system but lacks seeds and flowers?
a) Bryophyta
b) Pteridophyta
c) Gymnosperms
d) Angiosperms
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Correct Answer: b) Pteridophyta
Explanation: Pteridophyta, or ferns and their allies, have a well-developed vascular system for water and nutrient transport but reproduce via spores and lack seeds and flowers.
Q16. Which plant division includes plants that are commonly used for their economic importance, such as timber, paper, and medicinal compounds?
a) Bryophyta
b) Pteridophyta
c) Gymnosperms
d) Angiosperms
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Correct Answer: c) Gymnosperms
Explanation: Gymnosperms, including conifers like pine, spruce, and fir trees, are economically important for timber production. They are also used in paper manufacturing and provide medicinal compounds.
Q17. Which plant division is characterized by having a dominant gametophyte generation and a sporophyte generation dependent on it?
a) Bryophyta
b) Pteridophyta
c) Gymnosperms
d) Angiosperms
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Correct Answer: a) Bryophyta
Explanation: Bryophyta, such as mosses and liverworts, typically have a dominant gametophyte generation (haploid) and a sporophyte generation (diploid) dependent on it.
Q18. Which plant division includes plants commonly used for ornamental purposes in gardens and landscapes?
a) Bryophyta
b) Pteridophyta
c) Gymnosperms
d) Angiosperms
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Correct Answer: d) Angiosperms
Explanation: Angiosperms, or flowering plants, are commonly used for ornamental purposes in gardens and landscapes due to their diverse flower colors, shapes, and sizes.
Q19. Which plant division is characterized by having a sporophyte generation that is the dominant, visible plant form?
a) Bryophyta
b) Pteridophyta
c) Gymnosperms
d) Angiosperms
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Correct Answer: d) Angiosperms
Explanation: Angiosperms typically have a dominant sporophyte generation, which is the visible plant form that produces flowers and seeds.
Q20. Which plant division includes plants that often form symbiotic relationships with fungi to enhance nutrient uptake?
a) Bryophyta
b) Pteridophyta
c) Gymnosperms
d) Angiosperms
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Correct Answer: d) Angiosperms
Explanation: Angiosperms commonly form symbiotic relationships with fungi, known as mycorrhizae, to enhance nutrient uptake, particularly phosphorus and nitrogen, from the soil.