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Intro to Plants and Non-vascular plants IN: 81a

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Title: Plant Notes Day 1 Author: hkl16561 Last modified by: Robin Berry Created Date: 3/27/2003 7:10:56 PM Document presentation format: On-screen Show (4:3) – PowerPoint PPT presentation

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Title: Intro to Plants and Non-vascular plants IN: 81a


1
Intro to Plantsand Non-vascular plantsIN 81a
2
General Characteristics
  • Autotrophic
  • Multicellular
  • Non-motile
  • Eukaryotic
  • Cell Wall made of Cellulose
  • Exhibit alternation of generation life cycle
  • Evolved from green algae

How do you know this cell is eukaryotic?
3
What do Cladograms show us?
4
Essentials for survival
  • 1. Light
  • 2.Water and minerals
  • 3.Gas exchange ability
  • 4.Ability to move water and nutrients

5
Plant Adaptations to Life on Land
Place the leaf cross-section on IN 80a

  1. Cuticle- waxy protective outer covering helps to
    prevent water loss injury

6
  • 2. stomata- openings on underside of the leaf
    that allow gas exchange prevent excessive
    water loss from the plant (transpiration)
  • Day-open (most of the time), release water
  • oxygen and take in carbon dioxide
  • Night- close to prevent water loss

7
3. Cellulose-carbohydrate that strengthens the
stems found in plant cell walls
In which group of organic compounds would you
place cellulose?
8
4. Spores, seeds, fruits- reproductive
structures 5. Leaves- photosynthetic organs 6.
Roots- organs to help anchor and absorb water
9
Vascular Nonvascular Plants
  • 2. Vascular
  • Plants which contain vessels for transport
  • xylem- vessels transporting water minerals up
    to leaves
  • Phloem- vessel transporting sugar down to roots
  • Cambium- found btw xylem phloem makes new
    xylem phloem
  • Example-flowers, trees
  • Nonvascular
  • Plants without vessels for water mineral
    transport
  • No true roots,stems or leaves
  • Example-mosses

10
Nonvascular Plants
moss
  1. AKA Bryophytes Division name
  2. Ex. Mosses, liverworts,hornworts
  3. Small, soft plants which grow in clumps
  4. Absorbs water like a sponge
  5. Live in moist, shaded areas
  6. Small in size (1-2 cm)
  7. Pioneer plants break down rock
  8. Grow close to the ground
  9. Depend on water for reproduction.
  10. No true roots, stems or leaves

liverwort
hornwort
11
Reproduction in Mosses
a. alternation of generations alternation
between haploid diploid stages b.
Gametophyte- body form which
produces gametes c. Sporophyte-
form which produces
spores, grows from a gametophyte
relies on it for water minerals
capsule
sporophyte
stalk
Stemlikestructure
Leaflike structure
gametophyte
Label the moss diagram on your left page IN
80b
12
Steps in reproductive cycle of a Moss IN80b
1. Spore(n) germinate form gametophyte (n)
generation. 2. Antheridium- forms male
gametes(sperm) ay tips of gametophyte 3.
Archegonium- forms female gametes(egg) at tips of
gametophyte. 4. Sperm fertilizes egg zygote
(2n) is formed 5. Zygote divides and forms
sporophtye (2n)
n
n
2n
n
2n
n
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