1. Plants: Types and Needs
Life Science
Week 12
Mrs. Rubright

2. Plants God created and sustains thousands of plant species.
There are over 300,000 species of plants.
All plants have several things in common
Plants make their own food
Plant cells have cell walls outside of their cell membranes
Plants reproduce with a two-part life cycle
Sporophyte – spore producing phase
Gametophyte – gamete producing phases

3. Types of Plants Nonvascular plants
Plants that don’t have vessels to transport materials throughout the plant
Mosses and liverworts are nonvascular plants
Vascular plants have vessels to transport material throughout the plant
Vascular plants can be as small as violets or as large as oak trees

4. Vascular Plants Vascular plants can be divided into two groups
Those that do not produce seeds
And those that do
Ferns and mosses do not produce seeds. They reproduce using spores
A spore is a small reproductive cell that can develop into an adult without fusing with another cell
Plants that produce seeds are also divided into two groups
Plants that produce seeds but not flowers
Plants that produce flowers

5. Gymnosperms
Plants that produce seeds but not flowers are called gymnosperms
There are four groups of gymnosperms:
Cycads
Ginkgoes
Gnetophytes
Conifers

6. Cycads Cycads are tropical gymnosperms that look like palm trees.
Leaves grow in clusters on top of the trunk.
Seeds develop in cones

7. Ginkgoes The only living species of Ginkgoes is the ginkgo tree
Fan shaped leaves with a forked, branching pattern of veins
Trees are either male or female
The seeds which only grow on female trees have a very bad smell

8. Gnetophytes There are many varieties of Gnetophytes
Large, leathery leaves
Seeds develop in cones
The welsithshia species can live to be 2000 years old

9. Conifers Conifers are the most common type of gymnosperm
We usually, incorrectly, just call them all pine trees
Seeds develop in cones
Usually have needles

10. Angiosperms
Plants that produce seeds in flowers are called angiosperms
These plants produce seeds in protective seed cases called fruit
Not all fruit is the kind that we eat
All agriculture crops, garden flowers and broad- leaved shrubs and trees are angiosperms

11. Angiosperms
Plants with seeds can also be classified according to their lifespan
Annuals complete their life-cycle in one growing season
Biennials complete their life-cycle in two growing seasons
Perennials live through many growing seasons

12. Types of Plants - Summary

13. Plant Needs All plants have the same basic needs in order to live Soil
Sun
Water
Carbon Dioxide
Space
Correct Temperature

14. Plant Needs Soil provides minerals and nutrients
Soil anchors the plant and holds water around it
Humus, partially decayed plant or animal matter, naturally mixes with pieces of rock to create soil.

15. Plant Needs Most plants make food through photosynthesis Ingredients:
Sunlight (energy)
Carbon Dioxide (CO2)
Water (H20)
Where:
Mainly, in the leaf.

16. Plant Needs Space and Temperature are also important to plants
Crowded plants grow smaller and die faster than plants that have room to grow
Each plant species has an ideal growth temperature
This can vary with the plants age.