Bryophytes- Development of primitive vasculature for water transport, though water absorption mechanism not present. Pteridophytes- Specialised vascular tissue for water transport, ability to collect water from moist soil. Gymnosperms- development of roots and vascular tissue for water absorption and conduction. Development of naked seeds that are wind pollinated. Sporophyte is dominant over the gametophyte. Angiosperms- Well developed vascular system, seed enclosed in seed coat. The earlier groups faced challenges in their transition from an aquatic to a terrestrial mode of life as they faced the problem of desciccation. Hence, they dried out quickly. Most earlier land plants were restricted to moist environments as a result. Minimizing the gametophyte and magnifying the sporophyte has led to the development of seed habit. Further, with the development of heterospory, the megaspore remains in the parent sporophyte and the microgametophyte travels to reach the ovule. Seed plants can reproduce independently of water. Solution Bryophytes- Development of primitive vasculature for water transport, though water absorption mechanism not present. Pteridophytes- Specialised vascular tissue for water transport, ability to collect water from moist soil. Gymnosperms- development of roots and vascular tissue for water absorption and conduction. Development of naked seeds that are wind pollinated. Sporophyte is dominant over the gametophyte. Angiosperms- Well developed vascular system, seed enclosed in seed coat. The earlier groups faced challenges in their transition from an aquatic to a terrestrial mode of life as they faced the problem of desciccation. Hence, they dried out quickly. Most earlier land plants were restricted to moist environments as a result. Minimizing the gametophyte and magnifying the sporophyte has led to the development of seed habit. Further, with the development of heterospory, the megaspore remains in the parent sporophyte and the microgametophyte travels to reach the ovule. Seed plants can reproduce independently of water..

1. Bryophytes- Development of primitive vasculature for water transport, though water absorption
mechanism not present.
Pteridophytes- Specialised vascular tissue for water transport, ability to collect water from moist
soil.
Gymnosperms- development of roots and vascular tissue for water absorption and conduction.
Development of naked seeds that are wind pollinated. Sporophyte is dominant over the
gametophyte.
Angiosperms- Well developed vascular system, seed enclosed in seed coat.
The earlier groups faced challenges in their transition from an aquatic to a terrestrial mode of life
as they faced the problem of desciccation. Hence, they dried out quickly. Most earlier land plants
were restricted to moist environments as a result.
Minimizing the gametophyte and magnifying the sporophyte has led to the development of seed
habit. Further, with the development of heterospory, the megaspore remains in the parent
sporophyte and the microgametophyte travels to reach the ovule. Seed plants can reproduce
independently of water.
Solution
Bryophytes- Development of primitive vasculature for water transport, though water absorption
mechanism not present.
Pteridophytes- Specialised vascular tissue for water transport, ability to collect water from moist
soil.
Gymnosperms- development of roots and vascular tissue for water absorption and conduction.
Development of naked seeds that are wind pollinated. Sporophyte is dominant over the
gametophyte.
Angiosperms- Well developed vascular system, seed enclosed in seed coat.
The earlier groups faced challenges in their transition from an aquatic to a terrestrial mode of life
as they faced the problem of desciccation. Hence, they dried out quickly. Most earlier land plants
were restricted to moist environments as a result.
Minimizing the gametophyte and magnifying the sporophyte has led to the development of seed
habit. Further, with the development of heterospory, the megaspore remains in the parent
sporophyte and the microgametophyte travels to reach the ovule. Seed plants can reproduce
independently of water.