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Cuticles
Waxy layer that helps retain water in plants adapted to living outside of water.
Stomata
"Breathing ports" in plants outside of water that allow for the exchange of CO2 and water.
Vascular tissue
Tissue that transports water and nutrients in plants.
Clubmosses
One of the three groups of Lycophytes, consisting of around 400 species.
Quillworts
One of the three groups of Lycophytes, consisting of around 150 species.
Spikemosses
One of the three groups of Lycophytes, consisting of around 700 species.
Whisk ferns
One of the three groups of ferns, consisting of 2 species.
Horsetails
One of the three groups of ferns, consisting of 15 species.
True ferns
One of the three groups of ferns, consisting of around 2000 species.
Sorus
Structures found on the underside of fern leaves where spores are produced.
Prothallium
Structure in ferns used for sexual reproduction.
Archegonia
Female structure in ferns.
Antheridia
Male structure in ferns.
Gymnosperm
A group of plants that includes conifers, ginkgo, ephera, welwitschia, and gnetum.
Conifers
Group of gymnosperms that are cone-bearing and consist of around 900 species.
Ginkgo
A single species of gymnosperm.
Ephera
A group of gymnosperms consisting of 35 species.
Welwitschia
A single species of gymnosperm.
Gnetum
A group of gymnosperms consisting of 35 species.
Angiosperm
A group of plants that produce seeds through flowers.
Pollen
Male gametophyte in gymnosperms and angiosperms.
Seeds
Dispersal units in gymnosperms and angiosperms.
Tree of Life
Represents the evolutionary relationships between different organisms.
Photosynthetic Summary
Summary of the photosynthetic capabilities of different plant groups.
Mobility of Life Cycle Phases Summary
Summary of the mobility of different reproductive phases in plants.
Spermatozoids
Self-propelled male gametes in plants.
Spores
Dispersal units in plants that are wind-dispersed.
Pollen (gymnosperm)
Pollen in gymnosperms that is wind-dispersed.
Seeds (gymnosperm)
Seeds in gymnosperms that are dispersed by wind or animals.
Pollen (angiosperm)
Pollen in angiosperms that is dispersed by wind or animals.
Seeds (angiosperm)
Seeds in angiosperms that are dispersed by water, wind, or animals.
Dependence on Water
The reliance of certain plant groups on water for survival.