U3 KA5 Flashcards
1
Q
What is Symbiosis?
A
- the co-evolved intimate relationship between members of different species.
2
Q
What is mutualism?
A
- a symbiotic relationship where both members benefit.
3
Q
How is the example, ‘Oxpeckers eating parasites living on a zebra’s skin’, Mutualistic?
A
- oxpeckers gain nutrients from eating the parasites.
- Zebras get the parasites removed from their skin.
4
Q
What is Parasitism?
A
- a symbiotic relationship where one member benefits and the other is harmed.
5
Q
What is a parasite?
A
- an organism that benefits from a host, by gaining its energy and nutrients, harming the host.
6
Q
Why must parasites maintain contact with the host?
A
- they have a limited metabolism and cannot survive out of contact with the host.
7
Q
How are parasites transmitted? (3)
A
- direct contact (eg. fleas and lice).
- resistant stages (eg. larvae).
- Vectors (eg. mosquitoes).
8
Q
What is the role of a secondary host to a parasite?
A
- some parasites require one to complete their life cycle.
