Extended answer on parasites

Question 1

Marks 1 and 2

Answer 1

Parasite benefits and host is harmed in terms of nutrients/energy
An example of this is a tapeworm being parasites to humans - it will live in the gut and feed on the nutrients that the humans digest, so the tapeworm gains nutrient and the human will lose them

Question 2

Marks 3,4 and 5

Answer 2

Parasites often have limited metabolism so will be unable to live outside of host
They can be transmitted by use of a vector, direct contact and resistant stages.

Question 3

Mark 6

Answer 3

Some parasites have a secondary host in order TP complete their lifecycle