HOW CAN
WE
PRODUCE A
GOOD
BIOLOGICAL
DIAGRAM?
Is this an insect pollinated
or a wind pollinated flower?
Justify your answer.
• Insect pollinated. Bees and moths
are their main pollinator!
• Bright petals to attract bees.
Colourful Lily flowers tend to have
rigid stamens to support the bee’s
weight.
• White Lily petals attract moths.
White Lily flowers have more
flexible stamens and a sweet scent.
Look at the equipment and think…
Lily dissection
You will need…
• Flowers
• Scalpel
• White tile
• Vista foil & Sellotape
• Seekers
• Hand lenses
What are the potential hazards?
How are you going to minimise
these hazards?
Hint: use your notes from last
lesson to help you with
labelling…
• Step 1: Scope Your Flower!- How many petals are there?
How are the leaves shaped? What do you see inside?
• Step 2: Petals and sepals- The outer ring of your flower
consists of sepals, and the inner ring is of petals.
• Step 3: The stamen- bust open an anther, is there any pollen in
there?
• Step 4: The Pistil (female Parts)- If you open it up, you
can see the chamber inside, and the path down the style
(the stalky part), and down to ovule.
• Step 5: Ovary and Nectary- Right at the base of the style
is the ovary, and is often a strong structure that contains all
the wee little ovules that can become viable seeds if
fertilized with pollen.
What are the features of a good biological
drawing?
• Neat
• Title and name of specimen (the type of flower)
• Labelled in detail- don’t just write the structure, what is
its function?
• Name your specimen (the type of flower)