Parasitism and mutualism SB9 Flashcards
1
Q
What kind of relationship is parasitism?
A
a feeding relationship
2
Q
how does parasitism work?
A
one organism (parasite) benefits by feeding off a host organism - CAUSING HARM TO THE HOST
3
Q
how does the parasite live with the host?
A
IN OR ON the host
4
Q
Give an example of a parasite that lives outside the host?
A
lice
5
Q
where does tape worm live?
A
inside the host
6
Q
What are characteristics of lice designed for feeding/living on host?
A
- sharp mouth parts to pierce skin and suck blood
- sharp claws to grip onto skin
- eggs are glued to hairs to prevent falling off
7
Q
what are the characteristsics of the tapeworm?
A
- hooks and suckers attach the worm’s head firmly to the hosts intestine wall
- segments contain male and female sex organs so fertilisation can occur
- flattened body allows absorption of nutrients over whole surface without need for digestive or circularitory systems
8
Q
what is the definition of a mutualistic relationship?
A
organisms that live together and benefit from the relationship
9
Q
Give 3 examples of mutualistic relationships?
A
flowers + bees
coral + algae
ox + ox pecker birds
