Bio 108 - Lecture 10 Flashcards Preview

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Flashcards in Bio 108 - Lecture 10 Deck (12):
1

Six Characteristics of Seedless Vascular Plants

1) Vascular Tissue
2) Complex multicellular Roots
3) Complex Multicellular leaves
4) Sporophyte Dominant in life cycle
5) Sporophylls
6) Variation in Spore Size among species

2

Vascular Tissue - what it includes

1) Xylem (water)
2) Phloem (Carbohydrates)
- Contain Lingin
Tracheids are dead hollow cells

3

Sporophylls
Phyll = ?
Angio = ?

- Modified leaves on sporophyte that bear sporangia
Phyll = Leaf
Angio = Vessel
Can be called a cone

4

Homosporous vs Heterosporous

Homosporous species make one size spore that becomes a gametophyte that makes both eggs and sperm
Heterosporous make two sizes, small making male gametophyte, and large making female gametophyte

5

Two Major lineages of Seedless Vascular Plants

1) Phylum Lycophyta
2) Phylum Pterophyta

6

Two Characteristics of All Seedless Vascular Plants

1) Gemtophytes tiny independent plants
2) Have flagellated sperm that must swim in water

7

Phylum Lycophyta - Characteristics

All Microphyllous
Only small ones left today

8

Phylum Pterophyta

- Homosporous
- 3 Extant groups
- all have megaphylls
- large leaves, pter = wing
- Produce clusters of sporangia on underside of leaves (sori)

9

Three Extant Groups of Phylum Pterophyta

1) Whisk Ferns
2) Horestails
3) True Ferns

10

Economic Uses for Vascular Plants

- Used for cleaning cook wear
- Flash powder
- Some edible (fiddleheads)

11

What Period were Lycophyta and Pterophyta Dominant?

Carboniferous Period

12

Coal Swamps - What?

Huge swamps and their organic matter later covered by marine sediments, huge amounts of co2 was released, causing global cooling. Lead to the extinction of coal swamps.