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Questions and Answers
What is the term for the seed-bearing plants of today?
When did evidence of the emergence of embryophyte land plants first occur?
What type of tissue did some free-sporing plants like Archaeopteris have by the late Devonian?
Which group of plants exemplifies the earliest groups thriving in marine environments?
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At what time did communities of complex, multicellular photosynthesizing organisms exist on land?
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By the late Devonian, some free-sporing plants such as Archaeopteris had ______ tissue that produced wood
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The evolution of plants has resulted in a wide range of complexity, from the earliest algal mats of unicellular archaeplastids evolved through ______, through multicellular marine and freshwater green algae
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Many of the features recognised in land plants today were present, including roots and ______, by the middle of the Devonian
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There is evidence that cyanobacteria and multicellular photosynthetic eukaryotes lived in freshwater communities on land as early as 1 billion years ago, and that communities of complex, multicellular photosynthesizing organisms existed on land in the late ______
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Evidence of the emergence of embryophyte land plants first occurs in the mid-Ordovician, around ______ years ago
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Evolution of plants has resulted in a wide range of complexity, from the earliest algal mats of unicellular archaeplastids evolved through ______
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By the late Devonian, some free-sporing plants such as Archaeopteris had ______ tissue that produced wood
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Evidence of the emergence of embryophyte land plants first occurs in the mid-Ordovician, around ______ years ago
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There is evidence that cyanobacteria and multicellular photosynthetic eukaryotes lived in freshwater communities on land as early as 1 billion years ago, and that communities of complex, multicellular photosynthesizing organisms existed on land in the late ______
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What is the term for the seed-bearing plants of today?
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What is the term used for the earliest algal mats of unicellular archaeplastids evolved through endosymbiosis?
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During which time period did evidence of the emergence of embryophyte land plants first occur?
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What specific tissue did some free-sporing plants like Archaeopteris have by the late Devonian?
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What term is used for the seed-bearing plants of today?
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During which time period did communities of complex, multicellular photosynthesizing organisms exist on land?
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Study Notes
Key Terms and Concepts
- Seed-bearing plants of today are referred to as angiosperms and gymnosperms.
- The earliest algal mats evolved through endosymbiosis, giving rise to multicellular forms.
Emergence of Plants
- Evidence of the emergence of embryophyte land plants is first found in the mid-Ordovician, approximately 470 million years ago.
- Cyanobacteria and multicellular photosynthetic eukaryotes were present in freshwater communities on land as early as 1 billion years ago.
Plant Evolution Timeline
- Late Devonian marks the existence of complex, multicellular photosynthesizing organisms on land.
- By the late Devonian, free-sporing plants like Archaeopteris possessed vascular tissue that allowed wood production.
Structural Features
- By the middle of the Devonian, land plants exhibited key features such as roots and stems.
Plant Diversity
- The evolution of plants has led to significant complexity from simple unicellular archaeplastids to diverse forms including multicellular marine and freshwater green algae.
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Description
Test your knowledge of the evolution of plants from unicellular archaeplastids to seed-bearing gymnosperms and flowering plants. Explore the development of plant complexity from algal mats to terrestrial bryophytes, lycopods, and ferns.
