Plant Divisions

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Slide 1

Plant Diversity

The Evolution and Classification of Plants

Slide 2

What do I know about plants?

True or False

All plants perform photosynthesis.

All plants need water and nutrients.

All plants reproduce using flowers.

All plants reproduce using seeds.

Warm-up: Write each Question and Answer for Each.

Slide 3

Plant Characteristics

Multicellular eukaryotes

Photosynthetic autotrophs containing chloroplasts.

Non-mobile (fixed to one spot)

Cell walls made of cellulose

Responds to environment and grows through the use of hormones

Slide # 3

Slide 4

The ancestors of plants were multicellular green algae. They were completely immersed in water & dissolved minerals.

How to get chemical resources (water, minerals, oxygen, and carbon dioxide) separated into air and soil

How to transport resources within the plant.

How to prevent from drying out

How to reproduce without water

Plants Make the The Move to Land

Slide # 4

To move onto land, plants had to solve these problems:

Slide 5

Some Adaptations

(solutions)-

Have body parts extending into both air and soil

Develop a vascular system to transport resources in plant

Have a protective layer – cuticle (waxy outer layer) to keep from drying out

Specialized structures for reproduction including spores & seeds that do not dry out

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Slide 6

Plants are classified based on whether or not they have

Vascular System (transport)

Seeds

Flowers (enclosed seeds)

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Slide 7

Concept Map: Plants are divided 1st by whether or not they have a vascular system.

Bryophytes

Tracheophytes

Plants

Has Vascular Tissue

Has NO Vascular Tissue

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Slide 8

Bryophytes

-NONVASCULAR

Most primitive plants

Found in moist, shady areas

NO vascular (transport) system

Small size due to no vascular tissue

No true roots, stems, or leaves

Needs water for reproduction.

Reproduces using spores, -a water-proof single cell that can grow into a new organism.

Most common example: Mosses

Slide # 8

Slide 9

Typical Moss Plant (most common bryophyte)