Angiosperms Flashcards

Flashcards about Angiosperms

What are the defining features of angiosperms?

Flowers and fruits, enclosed seeds, and seed endosperm.

What is another name for angiosperms?

Anthophyta.

Why are angiosperms so successful?

1. complex vascular tissues; wide vessels;efficient transport 2. broad leaves = > photo. abscission vs H20 loss 3. fast life cycle 4. fruit protects seeds; dispersal 5. Coevolution  efficient reproduction

What are the key characteristics of angiosperms?

Efficient vessels, Flowers: sex, stigmatic germination and double fertilization, Fruit: protect & disperse seeds, 3n endosperm

When did the first flowers appear?

140 mya

What critical innovations led to extensive angiosperm diversification?

Stamen development and carpel development

What are the four types of organs in flowers?

Sepals, Petals, Stamens, and Carpels

What are sepals?

Green outer layer of flower

What are petals?

Often colorful

What are stamens?

Produce pollen

What are carpels?

Produce ovules

What is the pedicel?

Tip of the flower stalk

What is the perianth?

Petals and sepals

What supports flower organs?

Receptacle

What supports the receptacle & flower?

Peduncle

What is the style?

Long middle portion; Pollen tube delivers sperm to ovule

What is the ovary?

Encloses and protects ovules; develops into fruits

What is the stigma?

Receives and recognizes pollen

What is the stamen?

Male part of the flower, consisting of the anther and filament.

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