Reading: Chapter 5 Lecture 22. Evolution of Multicellularity, Colonization of Land.
Plants, Fungi, and the Colonization of Land. Migration onto Land Continents subjected to flooding...
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Transcript of Plants, Fungi, and the Colonization of Land. Migration onto Land Continents subjected to flooding...
Plants, Fungi, and the Colonization of Land
Migration onto Land
• Continents subjected to flooding and receding of seas throughout geologic time.
• Natural selection could have favored algae that could survive periods of being unsubmerged.
• Eventually, some species may have accumulated adaptations allowing permanent life out of water
Land vs. Water Environment
• Differences– Support– Access to minerals– Photosynthesis– Reproduction
Plant Structures
Sporangia
Plant Evolutionary History 1
Plant Evolutionary History 2
Alternation of Generations
Mosses
Ferns
GymnospermsM
F
Gymnosperm Life Cycle
Angeosperms
Flower Structure
Angeosperm Life Cycle
Wind Dispersal
Attach to Animals
Eaten By Animals
Mutualism
Fungi
• Developed closely alongside plants– Probably went on land with plants– Plants and other life rely on them
• Heterotrophic
• Structurally and reproductively different from all other organisms
• Primarily multicellular
Typical Fungal Structure
Bread Mold
Fungal life cycle
Lichens