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Plants - PowerPoint PPT Presentation


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Plants. Teaching Point #1. Almost all plants are autotrophic, eukaryotic and have cell walls. Teaching Point #2.

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Presentation Transcript
teaching point 1
Teaching Point #1
  • Almost all plants are autotrophic, eukaryotic and have cell walls.
teaching point 2
Teaching Point #2
  • Plants are grouped into 2 groups: nonvascular plants, which lack a well–developed system of tubes for transporting materials, and vascular plants, which have a system to transport materials.
teaching point 3
Teaching Point #3
  • The 3 main major groups of nonvascular plants are mosses, liverworts and hornworts, which all are low-growing plants in moist areas where they can directly absorb water and nutrients.
teaching point 4
Teaching Point #4
  • Ferns, club mosses and horsetails have vascular tissue but do not produce seeds; instead they reproduce by releasing spores.
teaching point 5
Teaching Point #5
  • Seed plants are vascular, use pollen and seeds to reproduce, and have stems and leaves to provide support and nutrients.
teaching point 6
Teaching Point #6
  • Gymnosperms produce naked seeds and angiosperms produce flowers and fruits.
teaching point 7
Teaching Point #7
  • In gymnosperms pollen falls from a male cone onto a female cone, and in angiosperms pollen from the anther falls on the flower’s stigma.
slide13

Sporophyte stage: A sporophyte produces SPORES, which are tiny cells that can grow into new organisms.

  • Gametophytestage: The plant produces sperm cells and egg cells.
what does it mean to be vascular or nonvascular
What does it mean to be vascular or nonvascular?

Nonvascular plants: NO VASCULAR TISSUE! (low-growing, no roots for absorbing water)

Vascular plants: HAVE VASCULAR TISSUE! (Suited to life on dry land, transport materials throughout plant, so can grow tall)

information check
Information check
  • Name 2 ways plant cells are different from other eukaryotic cells.
  • What adaptations do land plants have the water plants don’t?
  • Does algae need cuticles? Why or why not?
  • How do vascular plants differ from nonvascular plants?
  • What are the 2 major stages of a plant’s life?
plants without seeds
Plants WITHOUT Seeds

Nonvascular

Vascular

purpose of each
Purpose of each…
  • Phloem: Moves the food throughout the plant so nutrients reach EVERY cell!
  • Xylem: Moves the water and minerals from soil to the rest of plant.
  • Pollen: Sperm cells (that will eventually fertilize the egg cells)
  • Seed: The zygote! Seed contains the young plant and PROTECTS it.
  • Roots: Anchor the plant and absorb water and nutrients
  • Stem: Carries substances from roots up to plant. Also, holds the plant and leaves up so they can be exposed to sun
  • Leaves: Capture sun’s energy to make food (photosynthesis!)
information check1
Information check
  • Nonvascular seedless plants are all low-growing and live in moist areas. How are these 2 characteristics related?
  • What do you think is the MOST important adaptation of seed plants? Why?
slide20

All have flowers(The reproductive structure of angiosperms)

  • All have seeds protected by a FRUIT
  • All have “naked seeds” = NOT protected!
  • Many have needle-like leaves
flower structure
Flower structure

Attract pollinators

Where pollen is deposited

Location of pollen

Develops into a SEED

Ovary: Becomes the FRUIT: dispersal of seed

information check2
Information Check
  • Why are cones important for gymnosperms?
  • Compare and contrast reproduction in angiosperms and gymnosperms. (How are they similar? Different?)
  • What characteristics do all angiosperms share?
  • Is the following picture a gymnosperm or angiosperm?
check for understanding
Check for Understanding
  • What is the difference between a vascular and nonvascular plant? Give as many differences as you can.
  • Name adaptations that distinguish flowering plants from mosses.
  • Explain the role of stomata in leaves.
  • What role does a fruit play in an angiosperm’s life cycle? Give as many details as possible.
  • How does the sporophyte generation of a plant differ from the gametophyte generation of a plant?
  • What are the main functions of a plant’s roots, stems and leaves?