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Alle Oberthemen / Biology / Flowers and Fruits

Flowers & Fruits (15 Karten)

Sag Danke
1
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0
Define the following terms: flower, sepals, petals, stamens, pistil.
Flower: shoot bearing sporophylls (stamens, carpels)

Sepals: leaf like, green, protect bud

Petals: leaf like, non green, bright

Stamens: filament + anther

Pistil: 1 or more carpels consisting of stigma + style + ovary
Tags: angiosperms, flower, petals, pistil, sepals, stamens
Quelle:
2
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0
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
Tags: angiosperms, evolution, flowers, sepals, stamens
Quelle:
4
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0
What is a "perfect" flower? A pistillate flower? A staminate flower?
Has both male, female parts. I.E: has stamens and pistils
Pistillate: lack stamens (female flower)
Staminate: lack pistils (male flower)
Tags: angiosperms, flowers
Quelle:
5
Kartenlink
0
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
Tags: angiosperms, evolution, flowers, trends
Quelle:
6
Kartenlink
0
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
Tags: advanced, angiosperms, evolution
Quelle:
10
Kartenlink
0
Sexual reproduction requires:
-    Pollination
Tags: angiosperms, pollination
Quelle:
11
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0
Sexual reproduction may involve selfing or outcrossing. What are these?
Selfing:  pollination between anthers, pistil on 1 plant
Outcrossing:  pollination between anthers, pistils on separate plants
Tags: angiosperms, flowers, sexual reproduction
Quelle:
12
Kartenlink
0
What are 3 mechanisms that may promote outcrossing?
1. Genetic self-incompatibility
2. spatial separation of sexes
3. temporal separation of sexes
Tags: angiosperms, flowers, outcrossing, sexual reproduction
Quelle:
13
Kartenlink
0
Define protandry vs. protogyny.
Protandry: pollen shed before stigma receptive
Protogyny: stigma receptive before pollen shed.
Tags: angiosperms, flowers, protandry, protogyna
Quelle:
14
Kartenlink
0
Fruits consist of 3 layers, which are:
- exocarp (outer skin)
- mesocarp (middle flesh)
- endocarp (inner stone)
Tags: angiosperms, fruits
Quelle:
Kartensatzinfo:
Autor: zeestree
Oberthema: Biology
Thema: Flowers and Fruits
Schule / Uni: University of Hawaii at Manoa
Ort: Honolulu
Veröffentlicht: 20.04.2010
Tags: angiosperms, flowers, fruits
 
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)
sexual reproduction (2)
stamens (2)
trends (1)
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