L12B PLANTS Flashcards
Name plant characteristics. (6 total)
Cellular level? How does it live? How does it eat?
- Multicellar
- Eukaryotic
- Most are terrestrial.
- Non-motile
- Cells walls contain cellulose
- Most contain chlorophyll and scan synthesize organic products. (autotrophic)
Where are plants on the food chain?
Plants are the basis of the terrestrial food chain. They are producers.
Why are plants ecologically important?
Nutrition? Ecological benefits? Relation to other life? What about soil?
- They are the basis of the terrestrial food chain and virtually every organism depends on them (in)directly.
- They reduce greenhouse gasses
- They provide shade and shelter to wildlife.
- They build soil, they hold water and they hold soil.
Who is the ancestor of the plant?
Green algae.
What do plants and their ancestor have in common? 3 characteristics.
Plants and Green Algae both
1. Have the same photosynthetic pigments (chlorophyll a&b)
2. Both store carbohydrates as starch
3. Both have cellulose as main cell wall component.
What were 2 basic adaptations plants needed to survive on land?
- They developed a waxy cuticle that prevents desiccation (moisture loss).
- They developed stomata whihc are tiny pores on leaf surface that aid in gas exchange.
What is the purpose of the stomata?
The purpose of the stomata is to facilitate gas exchange.
Name the 4 main groups of land plants in descending order.
- Bryophytes
- Seedless vascular plants
- Gymnosperms
- Angiosperms
TRUE OR FALSE: Bryophytes & Gymnosperms have similar reproductive needs.
FALSE: Bryophytes and Seedless vascular plants are dependent on water for reproduction, while Gymnosperms and Angiosperms are independent of water, they use wind&animals.
What do gymnosperms and angiosperms have in common?
Both are independent of water and instead use help of wind & animals to reproduce.
Whihc group of plants produces fruits?
Angiosperms.
Name characteristics of bryophytes.
Do they have all pl comp.? What’s their env. like? Mode of nut.?
- They have no true tissues and no vascular system.
- They are very smol
- They do not have true organs and rely on diffusion.
- They depend on water for reproduction as they have flagellated sperm that needs to swim.
Give an example of a bryophyte.
Moss.
What are rhizoids?
Rhizoids are root-like structures that bryophytes use to anchor to the environment.
How large are bryophytes?
Generally one cell thick.
In what kind of environment to bryophytes live in?
Moist.