Chapter 30: Plant Diversity 2 Flashcards Preview

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Flashcards in Chapter 30: Plant Diversity 2 Deck (22)
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1
Q

Seed Plants

A
  •  Collectively called the spermatophytes
  •  Two clades
  • 1. Gymnosperms
  • 2. Angiosperms
2
Q

Seed Plant Adaptations

A
  •  Five crucial adaptations
    • 1. Reduced gametophytes
    • 2. Heterospory
    • 3. Ovules
    • 4. Pollen
    • 5. Seeds
3
Q

​Reduced Gametophyte

A
  •  Microscopic
  •  Retained in sporangium
  •  Dependent on sporophyte
    •  protection
    •  nutrients
4
Q

Heterospory

A
  •  is the production of two kinds of spores
    • 1. Megasporangia – megaspores
    • 2. Microsporangia – microspores
  •  Spores give rise to gametophyte
5
Q

Ovule

A
  •  Components include
    • 1. Megasporangium
    • 2. Megaspore
    • 3. Integuments
6
Q

Pollen Grain

A
  •  Composed of
    • 1. Male gametophyte
    • 2. Pollen wall
  •  Often modified for dispersal
7
Q

​Seed Advantages

A
  •  Advantages
    • 1. Seed coat
    • 2. Food supply
    • 3. Long term dormancy
    • 4. Dispersal 
8
Q

Gymnosperms

A
  •  Seeds on cones
  •  Four phyla
    • 1. Cycadophyta
    • 2. Ginkgophyta
    • 3. Gnetophyta
    • 4. Coniferophyta
9
Q

Phylum Cycadophyta

A
  •  Large cones, palmlike leaves
  •  Severely threatened
10
Q

Phylum Ginkgophyta

A
  •  One living species, Gingko biloba
  •  Highly tolerant to air pollution 
11
Q

Phylum Gnetophyta

A
  •  Composed of three genera
  •  Wide range appearance, locations
12
Q

Phylum Coniferophyta

A
  • Largest phyla
  •  Most are evergreens
    •  photosynthesize all year
  •  “Woody cones & needles”
13
Q

Gymnosperm Life Cycle

A
  •  Three key features
    • 1. Dominant sporophyte
    • 2. Sperm to ovule by pollen
    • 3. Seeds from fertilized ovules
14
Q

Life Cycle of Pine

A
15
Q

Angiosperms

A
  •  Commonly called flowering plants
  •  Phylum Anthophyta
  •  Most diverse; wide spread of all plants
  •  Two key features
    • 1. Flowers
    • 2. Fruit
16
Q

Flower

A
  • Specialized for sexual reproduction
  • Four modified leaves
    • 1. Sepals
    • 2. Petals
    • 3. Carpels/Pistils
    • 4. Stamens
  • Complete or Incomplete
17
Q

Fruit

A
  • is a mature ovary
  • Protect seeds
  • Aid in dispersal
  • Can be fleshy or dry
18
Q

Angiosperm Life Cycle

A
19
Q

Angiosperm Diversity

A
  •  Two main groups
    • 1. Monocots
    • 2. Eudicots – “true dicots” 
    • 3. Basal angiosperms
    • 4. Magnoliids
20
Q

Basal Angiosperms

A
21
Q

Magnoliids

A
22
Q

Monocots vs. Eudicot

A