What did sepals evolve from? Petals? Stamens? Carpels?
Sepals: Modified leaves
Petals: modified leaves OR stamens that lost sporangia
Stamens: reduced microsporophylls OR branches with terminal sporangia
Carpels: folded megasporophylls
Petals: modified leaves OR stamens that lost sporangia
Stamens: reduced microsporophylls OR branches with terminal sporangia
Carpels: folded megasporophylls
Tags: angiosperms, evolution, flowers, sepals, stamens
Quelle:
Quelle:
Describe the evolutionary trends of primitive flowers (floral parts, completeness, organ arrangement, ovary position, symmetry):
Floral parts: many, indefinite #
Completeness: complete
Organ arrangement: spiral
Ovary: superior
Symmetry: radial
Completeness: complete
Organ arrangement: spiral
Ovary: superior
Symmetry: radial
Tags: angiosperms, evolution, flowers, trends
Quelle:
Quelle:
Describe the evolutionary trends of advanced flowers (floral parts, completeness, organ arrangement, ovary position, symmetry):
Floral parts: few, definite #
Completeness: incomplete
Organs: shortened
Ovary: inferior
Symmetry: bilateral
Completeness: incomplete
Organs: shortened
Ovary: inferior
Symmetry: bilateral
Tags: advanced, angiosperms, evolution
Quelle:
Quelle:
Kartensatzinfo:
Autor: zeestree
Oberthema: Biology
Thema: Flowers and Fruits
Schule / Uni: University of Hawaii at Manoa
Ort: Honolulu
Veröffentlicht: 20.04.2010
Schlagwörter Karten:
Alle Karten (15)
advanced (1)
angiosperms (10)
asteraceae (1)
classification (1)
definition (1)
dehiscent (1)
dry (1)
eudicots (1)
evolution (3)
fleshy (1)
floral symetry (1)
flower (1)
flowers (6)
fruits (2)
indehiscent (1)
infloresence (1)
monocot (1)
orchidaceae (1)
outcrossing (1)
ovary position (1)
petals (1)
pistil (1)
pollination (1)
protandry (1)
protogyna (1)
sepals (2)
stamens (2)
trends (1)
