Plant Evolution Quiz

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Questions and Answers

What is the term for the seed-bearing plants of today?

  • Gymnosperms
  • Angiosperms (correct)
  • Lycopods
  • Bryophytes

When did evidence of the emergence of embryophyte land plants first occur?

  • 470 million years ago (correct)
  • 1 billion years ago
  • 850 million years ago
  • 390 million years ago

What type of tissue did some free-sporing plants like Archaeopteris have by the late Devonian?

  • Meristematic tissue
  • Ground tissue
  • Epidermal tissue
  • Secondary vascular tissue (correct)

Which group of plants exemplifies the earliest groups thriving in marine environments?

<p>Algae (C)</p> Signup and view all the answers

At what time did communities of complex, multicellular photosynthesizing organisms exist on land?

<p>850 million years ago (D)</p> Signup and view all the answers

By the late Devonian, some free-sporing plants such as Archaeopteris had ______ tissue that produced wood

<p>secondary vascular</p> Signup and view all the answers

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

<p>endosymbiosis</p> Signup and view all the answers

Many of the features recognised in land plants today were present, including roots and ______, by the middle of the Devonian

<p>leaves</p> Signup and view all the answers

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 ______

<p>Precambrian</p> Signup and view all the answers

Evidence of the emergence of embryophyte land plants first occurs in the mid-Ordovician, around ______ years ago

<p>470 million</p> Signup and view all the answers

Evolution of plants has resulted in a wide range of complexity, from the earliest algal mats of unicellular archaeplastids evolved through ______

<p>endosymbiosis</p> Signup and view all the answers

By the late Devonian, some free-sporing plants such as Archaeopteris had ______ tissue that produced wood

<p>secondary vascular</p> Signup and view all the answers

Evidence of the emergence of embryophyte land plants first occurs in the mid-Ordovician, around ______ years ago

<p>470 million</p> Signup and view all the answers

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 ______

<p>Precambrian</p> Signup and view all the answers

What is the term for the seed-bearing plants of today?

<p>gymnosperms and angiosperms</p> Signup and view all the answers

What is the term used for the earliest algal mats of unicellular archaeplastids evolved through endosymbiosis?

<p>algal mats</p> Signup and view all the answers

During which time period did evidence of the emergence of embryophyte land plants first occur?

<p>mid-Ordovician</p> Signup and view all the answers

What specific tissue did some free-sporing plants like Archaeopteris have by the late Devonian?

<p>secondary vascular tissue</p> Signup and view all the answers

What term is used for the seed-bearing plants of today?

<p>angiosperms</p> Signup and view all the answers

During which time period did communities of complex, multicellular photosynthesizing organisms exist on land?

<p>late Precambrian</p> Signup and view all the answers

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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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