The Plant Kingdom

1
The Plant Kingdom

• Introduction to Plant Science

2
Plants

• Stationary
• Manufacture their own food
• Continuous types of growth which is modified by
  the environment
• No definite form when mature

3
Kingdoms

• Possibly 500,000 different types of plants exist.
  
• Divided into kingdoms
• Monera bacteria and blue-green algae
• Protista other algae and protozoans
• Mycota Fungi and molds
• Plantae Mosses, ferns, and seed plants

4
What is Evolution

• Evolution - A gradual process in which something
  changes into a different and usually more complex
  or better form

5
How did it all start?

• The earliest Know forms of life date back 3.5
  billion years
• Bacteria Blue-green Algae
• Green algae and fungi appeared 1 billion years
  ago.
• Photosynthetic algae began producing oxygen about
  600 million year
  ago.

6
Land Plants

• Land plants started about 400 million years ago
  fern like
• The first seed plants occurred about 350 million
  years ago.
• Seed ferns

7
Flowering Plants

• Flowering plants developed about 120 million
  years ago or earlier.
• Today flowering plants make up about 2/3 of all
  plants.

8
Distribution
9
Distribution

• Plants are everywhere on earth except the polar
  zones, the highest mountains, the deepest oceans,
  and the driest deserts
• Each plant has a limited distribution depends
  on requirements
• Soil
• Climate greatest number of plants are near the
  equator as you move away from the tropics plants
  adapt to drier colder conditions.
• Moisture

10
Questions for Review

• List four characteristics of plants.
• Define evolution.
• Give some information about the first plants on
  earth (how it started, land plants, flowering
  plants).
• Where are plants located on earth?
• What three things determine where plants can live?