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Kingdom Plantae Evolutionary tree of plants From primitive more advanced traits Angiosperms Bryophytes Green alga ancestor Trachephytes Gymnosperms Flowers Seeds and pollen Vascular Terrestrial [email protected] ______ 2 [email protected] 3 I. SEED PLANTS A. All are heterosporous vascular plants. B. Three major reproductive adaptations: 1. Gametophyte reduced to dependence on sporophyte: retained in moist reproductive tissue. 2. Seed – “baby plant in a lockbox with its lunch”; highly resistant structures that allow for a dormant phase in the life cycle to wait out poor environmental conditions. 3. Evolution of pollen as male gametophyte – many seed plants are no longer tied to external water for fertilization. C. Common ancestor with seeds gave rise to all seed plants (gymnosperms and angiosperms); together, gymnosperms and angiosp.
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BOT ______: Introductory Biology of Phanerogams TOPIC Basic Life Cycles of Phanerogams: Gymnosperms and Angiosperms BY IT GBADAMOSI [email protected] ______ 1 INTRODUCTION
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Three major reproductive adaptations: 1. Gametophyte reduced to dependence on sporophyte: retained in moist reproductive tissue. 2. Seed – “baby plant in a lockbox with its lunch”; highly resistant structures that allow for a dormant phase in the life cycle to wait out poor environmental conditions. 3. Evolution of pollen as male gametophyte – many seed plants are no longer tied to external water for ______.
fertilization
All are heterosporous vascular plants. B. Three major reproductive adaptations: 1. Gametophyte reduced to dependence on sporophyte: retained in moist reproductive tissue. 2. Seed – “baby plant in a lockbox with its lunch”; highly resistant structures that allow for a dormant phase in the life cycle to wait out poor environmental conditions. 3. Evolution of pollen as male gametophyte – many seed plants are no longer tied to external water for fertilization. C. Common ancestor with ______ gave rise to all seed plants (gymnosperms and angiosperms); together, gymnosperms and angiosp.
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Kingdom Plantae Evolutionary tree of plants From ______ more advanced traits Angiosperms Bryophytes Green alga ancestor Trachephytes Gymnosperms Flowers Seeds and pollen Vascular Terrestrial [email protected] 121 2 [email protected] 3 I. SEED PLANTS A. All are heterosporous vascular plants. B. Three major reproductive adaptations: 1. Gametophyte reduced to dependence on sporophyte: retained in moist reproductive tissue. 2. Seed – “baby plant in a lockbox with its lunch”; highly resistant structures that allow for a dormant phase in the life cycle to wait out poor environmental conditions. 3. Evolution of pollen as male gametophyte – many seed plants are no longer tied to external water for fertilization. C. Common ancestor with seeds gave rise to all seed plants (gymnosperms and angiosperms); together, gymnosperms and angiosp.
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Study Notes
Kingdom Plantae: Evolutionary Tree
- The evolutionary tree of plants shows the progression from primitive to more advanced traits.
- The green alga ancestor is the common ancestor of all plants.
Characteristics of Seed Plants
- All seed plants are heterosporous vascular plants.
- Three major reproductive adaptations of seed plants:
- Gametophyte reduced to dependence on sporophyte, retained in moist reproductive tissue.
- Seed: a highly resistant structure that allows for a dormant phase in the life cycle, protecting the "baby plant" and its nutrients.
- Evolution of pollen as male gametophyte, allowing for fertilization without external water.
Common Ancestor of Seed Plants
- The common ancestor of seed plants gave rise to both gymnosperms and angiosperms.
- Gymnosperms and angiosperms share a common ancestor that evolved seeds.
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Description
Test your knowledge on the basic life cycles of phanerogams, specifically gymnosperms and angiosperms. This quiz covers topics such as the evolutionary tree of plants, the characteristics of angiosperms and gymnosperms, and the importance of flowers, seeds, and pollen. Challenge yourself and see how well you understand the biology of phanerogams!
