Angiosperms: Flowering plants

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Angiosperms: Flowering plants




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Presentations text content in Angiosperms: Flowering plants

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Angiosperms: Flowering plants

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Angiosperms: Flowering plants

Characteristics of Angiosperms (Division Anthophyta

)

Presence of complete or incomplete flowersMonocotyledonous or Dicotyledonous development

Xylem and Phloem well defined within monocot or dicot arrangements.Presence of herbaceous or woody stems with monocot or dicot arrangement.

Woody stems containing spring and summer wood.

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.

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Male flowers

Female Flowers Magnified

Female Flowers

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II. Angiosperms’ Evolutionary Timeline

Angiosperms arose during the Mesozoic era, according to the fossil record

During the disappearance of the greatest concentration of cycadeoids, angiosperms began differentiating and becoming more numerous during the end of the era.

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.

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III. Parts of a Flower

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Parts of a Flower..(Cont.)

Petals – showy part of the flower

Sepals – green bud covering over flower

Stamen – male part of the flower

Anther – pollen headFilament – stalk that holds up the anther

Pistil - female part of the flower

Stigma – platform where pollen lands

Style – stalk that holds up the stigmaOvary – contains the ovules

Ovule – structure which develops into embryos in the form of seeds

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Stamens from an Amaryllis

Anther

Filament

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Stigma

Style

Ovary

(Squash)

Female Flower Parts

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Typical Fruits

Apple

Orange

Tomato

Pepper

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More Fruits you probably didn’t suspect!

Cashew

Walnut

Chestnut

Acorn

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Okra

Squash

Corn

Cucumber

Even More Fruits!

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Fruit

Stem

The Stem attaches the flower and then the fruit to the branch it develops on.

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Monoc0ts vs. Dicots

Monocots

Dicots

Flower parts in multiples of 3

Parallel venation

Vascular bundles arranged throughout stem

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!

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Typical monocots

Lily

Grasses

Palm Trees

Wheat

Orchids

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Oaks

Roses

Buttercups

Hibiscus

Red Maple

Typical dicots

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