BD 5 WORKING PLANT

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BD 5 WORKING PLANT
Why are plants important?
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Why are plants important?

• Read page 152 the first page of Working plant
  chapter in Dobson.
• Use a whole page and draw a spider diagram using
  the following slide to help you.
• Give the diagram the title The importance of
  plants and put today's date.

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Chemicals
Timber
Importance of plants
Food
Clothing
Oxygen
Water
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Margosan pyretrin The pill (Yam) aspirin (from
willow tree)
fertilisers
pesticide
drugs
chemicals
chain
timber
carbohydrates
Importance of plants
food
Protein
clothing
Fat
fibres
Energy
Water
oxygen
cotton
linen flax Jute
Respiration
vapour
Photosynthesis
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External parts of a flowering plant
Flower
Buds
Leaves
Stem
Roots
Main root
Root hairs
side or lateral root
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Stick your picture in your book
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THE FLOWERING PLANT

• On the next slide
• the functions of different parts have been
  jumbled up.
• Can you match the parts with the correct
  function?

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Parts Functions

• Makes food by photosynthesis
• Contains male and female reproductive parts
• Anchors plant in soil
• Takes in water minerals
• Partly grown leaves and flowers
• Protects young parts
• Contains transport systems for food water
• Makes seeds
• Holds plant upright ie support
• Attracts insects

• Flower
• Bud
• Stem
• Leaf
• Root
• Root hairs

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Draw a table to show a flowering plants parts
and their functions. (Dobson page 158 may
help you.)
The correct answers are on the next slide
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What are these ?
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Why does plant need a transport system?
You will now need to rough notes as I talk about
a plants transport system
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• The next few slides will show you the inside of a
  root.
• Note the names of the different parts and the
  jobs that they do

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A longitudinal section through a root
Root hairs
take in water
Cortex
stores some food as starch
Phloem
brings food from the leaves which is used to make
new cells at the root tip
Xylem
carries water and mineral salts up the stem
Root cap
Root tip
protects the root tip as it grows through the soil
stores some food as starch
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Structure of the root
packing tissue (parenchyma)
xylem
epidermis
phloem
Root hair
central part vascular bundle
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Cross section through a root
or Vascular bundle
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A Microscopic slide of a root
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Root hairs
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A root hair cell
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Why are root hairs good for taking up
water(Adaptations)

• Long and thin
• Thin walls/membranes

• Large surface area for absorption
• Permeable to water and minerals

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Draw and label the diagram below.
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Explain how a root hair is adapted to its
function.Give 4 important points
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How water moves into the root
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Types of Roots
Examples of fibrous roots
A carrot is a tap root

• Tap
• Lateral
• Fibrous
• Adventitious

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Lesson 1 Work to do

• Stick in picture of external parts of a typical
  flowering plant.
• Draw a table giving parts and functions of a
  flowering plant.
• Draw large clearly labelled diagrams of a
  longitudinal and a cross section through a root .
• Give 4 ways a root is adapted
• HOMEWORK
• Read Dobson page152 and give 10 reasons why
  plants are important / spider diagram
• Q 48 - Copy diagrams and complete from memory
  exam question. Then write on flowering plant A4
  worksheet