Biology Adaptations

06.01.2011 Biology Adaptations

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Adaptation
How are species adapted to their Environment?
LO: all should be able to describe the 3 types of adaptations species evolved to suit their environment,
giving specific examples where appropriate.
The term species refers to a group of organisms which have the similar morphology, behaviour, physiology
and are reproductively isolated from other animals and must be able to produce fertile offspring.
Adaptations ­ Physiological ­ This means an adaptation to do with the internals of an animal, Behavioural ­
to do with the behavioural adaptations of an animal, Anatomical ­ This means adaptations to do with the
external body.
1. A barn owl may have disc feathers surrounding its face because it helps it hear much more.
2. The owl moves is head when it hears its prey because it may be able to see it and it also moves the
feathers away from its ears so it may be able to hear its prey and zero in on where it is.
3. An owl has 2 ears so that I can hear a full 360 degrees around itself and Can judge distance and
direction of its prey.
4. The owl has an advantage having two ears so it can find its prey where ever it is. Moving its head
when hearing prey allows it to spot and zero in on where the animal is.
5. An owls silent flight will allow it to surprise its prey and it will conceal itself from predators.
6. Having feather barbs reduces the turbulence the owls wings make whilst they are cutting through
the air, these barbs allow the feathers to be smoother, reducing the noise made and reducing
resistance in the air.
7. This structural adaptation will allow it to surprise its prey, flee silently from predators and will allow
it to avoid predators in the first place and it allows
8. The Galapagos barn owl has a different colour and appearance to the British barn owl because it is
in a completely different environment compared to Britain and it has adapted itself so that it is well
camouflaged in its own environment.
9. If it was a bad vole year, the larger one would be most likely to survive because they can look
more threatening to predators which are after them, also it will be able to protect itself better and
be able to hunt larger prey.
10. If it was a bad vole year and all of the owlets were the same size, they will probably die out if they
are smaller because they cannot defend themselves or hunt as well. If they were larger they may
survive because they look more threatening to predators which may put off predators, they also
may be able to hunt larger prey.
11. The middle toe of a barn owl has been adapted to clinging to branches and other objects which will
help it stay still so it can listen for prey, it also will make it more stable while it is on a branch
looking for its prey so it does not fall and have to give away where it is.
12. Good hearing ­ allows it to find its prey effectively in the dark (Anatomical adaptation)
Feather structure ­ allows it to fly silently to surprise prey and avoid predators (Anatomical
Adaptation)
Competing for food ­ This will use all of the other adaptations and use it to its advantage
(Behavioural Adaptation)
Laying eggs at 23 day intervals ­ This will allow the owl to keep her eggs safe because if she laid
her eggs all at once then they may be all eaten, but laying in 23 day intervauls will reduce that risk
(physiological Adaptation).

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Incubating immediately ­ If the owl incubates the eggs imediately then it will give a reduced time to
hatch, meaning quicker growth and more chance of survival before food is gone. (behavioural
Adaptation).
Toe Structure ­ Its toe structure allows it to silently hear for prey while being completely still and
camouflaged from predators (Behavioural Adaptation).
13.…read more

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