Adaptations File

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Transcript Adaptations File

Adaptations
08 April 2017
Starter
• For each of the following environments what
might be important to consider if you are
going to survive?
DESERT
ARCTIC
Spot the difference
DESERT
ARCTIC
• Skinny (thin layers of body fat),
keep nearly all their fat in their
humps. Large surface area : volume.
• Compact round shape (thick layers
of blubber), well insulated & energy
store. Small surface area : volume.
• Large feet (easy movement).
• Large feet (Spread the load).
• Sandy colour (camouflage).
• White colour (camouflage)
• Short hair (keeping cool).
• Thick hairy coats (greasy too!!)
08 April 2017
Adaptations
By the end of the lesson I will be able to:
•Identify the role of adaptation in animal and plant
survival.
•Describe examples of animals and plants which are
adapted to survive in particular environments.
Adaptation
What is adaptation?
Adaptations are how organisms
have evolved biologically to
become ‘more suited’ to their
habitat or their ‘lifestyle’
Crocodiles are adapted to being
predators by having sharp
teeth.
Organisms can also have
developed adaptive behaviour
to increase their chance of
survival.
Penguins huddle together to
reduce the amount of heat
energy they lose.
Plant Adaptations – Desert Plants
Plants that live in deserts are
adapted to reduce the amount
of water they lose.
Cacti often have no or highly
adapted (thin) leaves, this
reduces the amount of water
lost through the stoma.
They also have a small
surface area compared to
their size to stop water loss.
A cactus plant stores its water
in the thick stem. Plants that
do this are classed as
succulent plants.
Some cacti have shallow wide
spreading roots and others deep
roots to access any water available.
Plant Adaptations – Predators
Some plants and animals are adapted to protect
themselves from predators –
ROSES & CACTI
Spines and thorns.
KEEPS THEM SAFE!!
TORTOISES
Rock hard shells.
KEEPS THEM SAFE!!
BRING
IT!!
Work to do
• Visit the 6 information
stations
• Read the information and
summarise in your tables
• 3 minutes at each station
Mini Plenary
1. Which animal has a small surface area
compared to volume?
2. How do we know caribou are mammals?
3. Why do cacti have a waxy cover?
4. Does the arctic willow grow high or
low?
5. What feature of elephants shows they
are adapted to living hot places?
Questions
1. Reindeer live in the arctic circle. Their
fur is hollow. Each hair is a tube. How
is this an adaptation to life in the cold?
2. Why is it important for animals to keep
a constant temperature?
Adapt and Survive
- Plenary
1. Cactus plants can live
in hot, dry deserts.
leaves
stem
roots
Choose two labelled parts.
Explain how each of these
parts help the cactus to
survive in hot, dry conditions.
Part ..................................
Explanation .....................................................
............................................................................
Part .................................
Explanation .....................................................
............................................................................
(Total 4 marks)
Plenary - Mark Scheme
1. Any two of:
Roots – no mark
Long (OWTTE) roots; (extent of roots must be overt in answer)
to find / absorb / get water / moisture;
(ignore nutrients: reject food:
1
Leaves – no mark
Small (OWTTE) / spiky leaves; (reduced size of leaves must be overt in answer)
to reduce water loss / keep water in;
(ignore reference to protection from herbivores
1
Stem – no mark
Large / fat (OWTTE) stem (enlarged size of stem must be overt in answer)
/accept thick/waxy cuticle/skin;
Store (OWTTE) water/ moisture;
1
[4]
08 April 2017
Plenary
How have we done?
•Identify the role of adaptation in animal and plant
survival.
•Describe examples of animals and plants which are
adapted to survive in particular environments.
True or false?
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