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PLANTS
Name all the plants you can think of…
What do these all have in common?

Chapter 9
• Plants are many-celled organisms
- most plants contain chlorophyll
- at least 260,000 plant species have been identified...
• Photosynthesis
- the process by which green
plants use sunlight to make
food from carbon dioxide
and water.

- Photosynt...
PLANT CELLS:
• Plant cells have:
- a cell membrane
- a nucleus and other organelles
- a cell wall
- chlorophyll – the green pigment use...
• Some plants also contain carotenoids
- Carotenoids are red, yellow or orange pigments
that are also used in photosynthes...
• PARTS:
- A cuticle is a waxy protective layer that covers the
stems, leaves and flowers of many plants
- The cuticle hel...
• Cellulose is a chemical compound made out of
sugar
- cellulose forms tangled fibers in cell walls and
provides structure...
• Plants can be categorized as vascular or
nonvascular

• Vascular plants have tubelike
structures that carry water and
nu...
• Nonvascular plants do not have the tubelike
structures
• Nonvascular plants use other ways to move
water and nutrients
• Nonvascular plants have rhizoids instead of roots.
• Rhizoids are structures that anchor the plants
where they grow
• Mo...
• Botany is the science of studying plants.

• In the late 1700s, Swedish
botanist Carolus Linnaeus
developed a system of
...
PARTS OF A PLANT
Leaf – the organ of a plant where photosynthesis
takes place
• Stem – support the branches, leaves, and
reproductive structures
Roots – act as anchors for a growing plant, holding
it in place.
- Water and substances enter a plant through
its roots.
Flower – the part of certain plants that develop
into fruit
- Flowering plants are called agiosperms
• Gymnosperms are vascular plants that produce
seeds that are NOT protected by fruit.
• Gymnosperms have no flowers
• Thes...
• In a seed plant, there are three tissues which
make up the vascular system:
- xylem - conducts water and dissolved nutri...
• In a seed plant, some spores develop into pollen
• A pollen grain is a small structure produced by
the male seed plant
•...
*FLOWERS*
- Flowers have four main parts: petals, sepals,
stamen and pistils
• Petals are the colorful parts
• Sepals are the leaflike parts outside the petals.
They form the outside of the flower bu...
Plants power point
Plants power point
Plants power point
Plants power point
Plants power point
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Plants power point

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Plant Basics- 7th Grade

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Plants power point

  1. 1. PLANTS Name all the plants you can think of… What do these all have in common? Chapter 9
  2. 2. • Plants are many-celled organisms - most plants contain chlorophyll - at least 260,000 plant species have been identified - plants are adapted to nearly every environment on earth - plants are important food sources for people and animals
  3. 3. • Photosynthesis - the process by which green plants use sunlight to make food from carbon dioxide and water. - Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
  4. 4. PLANT CELLS:
  5. 5. • Plant cells have: - a cell membrane - a nucleus and other organelles - a cell wall - chlorophyll – the green pigment used in photosynthesis - a central vacuole which regulates the water content of the cell
  6. 6. • Some plants also contain carotenoids - Carotenoids are red, yellow or orange pigments that are also used in photosynthesis
  7. 7. • PARTS: - A cuticle is a waxy protective layer that covers the stems, leaves and flowers of many plants - The cuticle helps prevent water loss in the plant
  8. 8. • Cellulose is a chemical compound made out of sugar - cellulose forms tangled fibers in cell walls and provides structure and support
  9. 9. • Plants can be categorized as vascular or nonvascular • Vascular plants have tubelike structures that carry water and nutrients throughout the plant
  10. 10. • Nonvascular plants do not have the tubelike structures • Nonvascular plants use other ways to move water and nutrients
  11. 11. • Nonvascular plants have rhizoids instead of roots. • Rhizoids are structures that anchor the plants where they grow • Most nonvascular plants are classified as mosses
  12. 12. • Botany is the science of studying plants. • In the late 1700s, Swedish botanist Carolus Linnaeus developed a system of classifying living things, using many different characteristics
  13. 13. PARTS OF A PLANT Leaf – the organ of a plant where photosynthesis takes place
  14. 14. • Stem – support the branches, leaves, and reproductive structures
  15. 15. Roots – act as anchors for a growing plant, holding it in place. - Water and substances enter a plant through its roots.
  16. 16. Flower – the part of certain plants that develop into fruit - Flowering plants are called agiosperms
  17. 17. • Gymnosperms are vascular plants that produce seeds that are NOT protected by fruit. • Gymnosperms have no flowers • These plants include conifers, such as pine trees, fir trees, and spruce – all are common evergreen trees
  18. 18. • In a seed plant, there are three tissues which make up the vascular system: - xylem - conducts water and dissolved nutrients upward from the root and also helps to form the stem - phloem - conducts sugars and other metabolic products downward from the leaves. - cambium - a thin layer between the xylem and phloem of most vascular plants that gives rise to new cells and is responsible for secondary growth.
  19. 19. • In a seed plant, some spores develop into pollen • A pollen grain is a small structure produced by the male seed plant • The transfer of pollen grains to reproduce is called pollination • Pollen can be transferred by gravity, wind, water, animals or insects
  20. 20. *FLOWERS* - Flowers have four main parts: petals, sepals, stamen and pistils
  21. 21. • Petals are the colorful parts • Sepals are the leaflike parts outside the petals. They form the outside of the flower bud • Stamen is the male reproductive part; pollen is produced in the stamen • Pistil is the female reproductive organ; the ovary is the base of the pistil where ovules are found – ovules produce eggs, or reproductive cells

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