1. Introduction to Plants

2. What is a Plant? Plants are multicellular eukaryotes.
Plants are autotrophs
Plants examples:
Trees
Shrubs
Grasses
Mosses
Ferns

3. Plant Life Cycle
Alternation of Generations: two alternating phases, a diploid (2n) phase and a haploid (N) phase.
During the two phases, mitosis and meiosis alternate to produce gametes and spores
Diploid (2N) phase=Sporophyte
Haploid (N) phase=Gametophyte

4. Plant Life Cycles

5. Plants Needs to Survive
Sunlight: Plants use energy from sunlight to carry out photosynthesis
Water and Minerals
Gas Exchange: Plants require Carbon Dioxide to carry out Photosynthesis
Movement of Water and Nutrients: Xylem and Phloem

6. Early Plants Much of Earth’s history, plants did not exist.
Early plants consisted of algae and photosynthetic prokaryotes in bodies of water
The first plants evolved from an organism much like the multicellular green algae.

7. The First Plants
Oldest known fossils of plants are nearly 450 million years old.
First true plants were similar to today’s mosses
First true plants were dependent on water to complete their life cycles.

8. Overview of the Plant Kingdom
Plant Kingdom divided into 4 basic groups based off three important features:
Water Conduction Tissues
Seeds
Flowers
4 Basic Groups
Non-vascular Plants
Seedless Vascular Plants
Seeded Vascular Plants
Gymnosperm
Angiosperm