Bio 314 - Exam 2 : Seed + Intro to Angiosperm

Key Innovations:

A trait that allows a linage to occupy a new niche, eventually leading to increased diversification and evolutionary success

Ovules mature into _____

seeds

3 components of a seed

1. Seed coat

2. Embryo

3. Food Storage

Ovule

Immature seed prior to fertilization

Advantages to having seeds

• protection of embryo

• stored food supply

• Dormancy

• Dispersal

Elkinsia

integumentary lobes not fused

What are angiosperms

Seed plants with flowers and fruits

Angiosperm are the _____ and ______ diverse group of plants on earth

youngest and most

Exact origin of angiosperm is

unknown

Amborella

oldest extant angiosperm lineage

4 types of whorls :

1. Calyx

2. Corolla

3. Androecium

4. Gynoecium

Calyx

Sepals

Corolla

Petals

Androecium

Stamens

Gynoecium

Carpels

True or false not all flowers have all 4 whorls

True

Monocots

• Seed - 1 cotyledon

• Root - fibrous

• flower - petals in 3’s

• Leaf - Narrow , parallel vein

• Vascular bundle - scattered

• pollen grain - 1 spore or furrow

Eudicots

• Seed - 2 cotyledons

• Roots - Tap

• Flowers - 4-5 petals

• Leaf - oval pr palmate, net like veins

• Vascular bundle- ringed

• Pollen - 3 pores or furrows

Evolution of Carpels

• Modified leaf

• Single fused carpel

• Three fused carpels