LAB: Seed Plants: Gymnosperms and Angiosperms Flashcards Preview

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Flashcards in LAB: Seed Plants: Gymnosperms and Angiosperms Deck (13)
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1

Seed Plants

  • contain vascular tissues
  • sporophyte dominant
    • Gymnosperms
    • Angiosperms

2

Gymnosperms

  • are the "naked seed" plants, producing seeds that are totally exposed or on the scales of cones (rather than being enclosed in fleshy fruit)

3

Kingdom Plantae (Gymnosperms)

  • Phylum Coniferophyta - conifers
  • Phylum Ginkgophyta - Ginkgoes
  • Phylum Cycadophyta - cycads
  • Phylum Gnetophyta - gnetophytes

4

Phylum Coniferophyta

 

  • most familiar of gymnosperms
  • Most are cone-bearing, woody evergreens (bear leaves throughout year)
  • leaves are modified into needles with a thick, waxy coat
  • Monoecious - male pollen cones and female seed cones born on same plant

5

Phylum Cycadophyta

 

(Sago Palms)

  • are dioecious (separate sexes with female plants bearing seed cones and male plants bearing pollen cones)
  • "Sago Palms"
  • going endangered due to being over harvested

6

Phylum Ginkgophyta

 

Ginkgo biloba

  • only surviving member of the phylum
  • oldest species of living trees
  • is dioecious
  • Unlike evergreens, ginkgoes are deciduous (shed leaves during fall)
  • Increases blood flow to brain

7

Phylum Gnetophyta

 

Ephedra

  • includes genus Ephedra
  • Is a stimulant
  • Possible ancestor to angiosperms
    • Same water conducting cells
    • cones arranged in clusters like flower clusters

8

Angiosperms

  • referred to as flowering plants
  • must abundant of all land plants
  • develop a flower for sexual reproduction, producing seeds enclosed in fruit
  • process of double fertilization 

9

Phylum Anthophyta

  • classified into 2 clades based on cotyledons
    • monocots and eudicots

10

Monocots

  • Embryo - one cotyledon
  • Leaf veins - parallel
  • Roots - fibrous roots
  • Floral parts - ​multiples of 3

11

Eudicots

  • Embryo - two cotyledons
  • Leaf veins - reticulated (net-like)
  • Roots - taproot (large) present
  • Floral Parts - multiples of four or five

12

Flower model labeled

  • Petal (coralla)
  • Sepal (​calyx)

13

Pollen grain

  • transfer of pollen from anther to stigma is pollination
  • pollen grain germinates with the tube nucleus forming a pollen tube
  • the generative nucleus moves into the pollen tube and divides to form two cells, the sperm