Bio 108 - Lecture 10 Flashcards

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1
Q

Six Characteristics of Seedless Vascular Plants

A

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

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2
Q

Vascular Tissue - what it includes

A

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

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3
Q

Sporophylls
Phyll = ?
Angio = ?

A
  • Modified leaves on sporophyte that bear sporangia
    Phyll = Leaf
    Angio = Vessel
    Can be called a cone
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4
Q

Homosporous vs Heterosporous

A

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

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5
Q

Two Major lineages of Seedless Vascular Plants

A

1) Phylum Lycophyta

2) Phylum Pterophyta

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6
Q

Two Characteristics of All Seedless Vascular Plants

A

1) Gemtophytes tiny independent plants

2) Have flagellated sperm that must swim in water

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7
Q

Phylum Lycophyta - Characteristics

A

All Microphyllous

Only small ones left today

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8
Q

Phylum Pterophyta

A
  • Homosporous
  • 3 Extant groups
  • all have megaphylls
  • large leaves, pter = wing
  • Produce clusters of sporangia on underside of leaves (sori)
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9
Q

Three Extant Groups of Phylum Pterophyta

A

1) Whisk Ferns
2) Horestails
3) True Ferns

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10
Q

Economic Uses for Vascular Plants

A
  • Used for cleaning cook wear
  • Flash powder
  • Some edible (fiddleheads)
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11
Q

What Period were Lycophyta and Pterophyta Dominant?

A

Carboniferous Period

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12
Q

Coal Swamps - What?

A

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.

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