angiosperms: flowering plants
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Angiosperms: Flowering plants. Angiosperms: Flowering plants. Characteristics of Angiosperms (Division Anthophyta ) Presence of complete or incomplete flowers Monocotyledonous or Dicotyledonous development Xylem and Phloem well defined within monocot or dicot arrangements. - PowerPoint PPT PresentationTRANSCRIPT
Angiosperms: Flowering plants
Angiosperms: Flowering plantsI. Characteristics of Angiosperms (Division
Anthophyta)A. Presence of complete or incomplete flowersB. Monocotyledonous or Dicotyledonous
developmentC. Xylem and Phloem well defined within
monocot or dicot arrangements.D. Presence of herbaceous or woody stems with
monocot or dicot arrangement.E. Woody stems containing spring and summer
wood.F. Presence of a pulpy or hard fruit that
contains the developing embryonic structure of sporophytic nature, which arises from the gametophyte during the alternation of generations.
Male flowers
Female Flowers Magnified
Female Flowers
II. Angiosperms’ Evolutionary Timeline
A. Angiosperms arose during the Mesozoic era, according to the fossil record
B. During the disappearance of the greatest concentration of cycadeoids, angiosperms began differentiating and becoming more numerous during the end of the era.
C. They continued to spread and further differentiated as animal pollinators became adapted to specific angiosperm species.
D. This continued with the greater diversity of animal
differentiation as it evolved simultaneously.
III. Parts of a Flower
III. Parts of a Flower..(Cont.)A. Petals – showy part of the flowerB. Sepals – green bud covering over
flowerC. Stamen – male part of the flower
1. Anther – pollen head2. Filament – stalk that holds up the
antherD. Pistil - female part of the flower
1. Stigma – platform where pollen lands
2. Style – stalk that holds up the stigma
3. Ovary – contains the ovulesE. Ovule – structure which develops
into embryos in the form of seeds
Stamens from an Amaryllis
Anther
Filament
Stigma
Style
Ovary (Squash)
Female Flower Parts
Typical Fruits
Apple Orange
Tomato Pepper
More Fruits you probably didn’t suspect! Cashe
wWalnutChestnu
t
Acorn
Okra
Squash
Corn
Cucumber
Even More Fruits!
Fruit
Stem
The Stem attaches the flower and then the fruit to the branch it develops on.
Monoc0ts vs. DicotsMonocots Dicots
1. Flower parts in multiples of 3
2. Parallel venation
3. Vascular bundles arranged throughout stem
4. One cotyledon (seed leaf)
Flower parts : Multiples of 4 or 5
Net venation
Vascular bundles mostly around edge of stem
Two cotyledons (seed leaves)
How many petals here?
Three!
How many petals here?
Five!
Typical monocots
1. Lily
2. Grasses
3. Palm Trees
4. Wheat
5. Orchids
1. Oaks
2. Roses
3. Buttercups
4. Hibiscus
5. Red Maple
Typical dicots