Bio 108 - Lecture 10

Question 1

Six Characteristics of Seedless Vascular Plants

Answer 1

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

Question 2

Vascular Tissue - what it includes

Answer 2

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

Question 3

Sporophylls
Phyll = ?
Angio = ?

Answer 3

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

Question 4

Homosporous vs Heterosporous

Answer 4

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

Question 5

Two Major lineages of Seedless Vascular Plants

Answer 5

1) Phylum Lycophyta

2) Phylum Pterophyta

Question 6

Two Characteristics of All Seedless Vascular Plants

Answer 6

1) Gemtophytes tiny independent plants

2) Have flagellated sperm that must swim in water

Question 7

Phylum Lycophyta - Characteristics

Answer 7

All Microphyllous

Only small ones left today

Question 8

Phylum Pterophyta

Answer 8

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

Question 9

Three Extant Groups of Phylum Pterophyta

Answer 9

1) Whisk Ferns
2) Horestails
3) True Ferns

Question 10

Economic Uses for Vascular Plants

Answer 10

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

Question 11

What Period were Lycophyta and Pterophyta Dominant?

Answer 11

Carboniferous Period

Question 12

Coal Swamps - What?

Answer 12

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.