KA5 Symbiosis

Question 1

What is symbiosis?

Answer 1

An intimate relationship which has co-evolved between members of two different species

Question 2

Describe the difference between parasitism and mutualism

Answer 2

In a parasitic relationship, a parasite benefits in terms of energy gain and nutrients, and its host is harmed due to the loss of these resources. In a mutualistic relationship, both partner species benefit in the interdependent relationship

Question 3

Without a host, a parasite _____?

Answer 3

Cannot survive due to it’s limited metabolism

Question 4

How are parasites transmitted

Answer 4

Parasites can be transmitted by direct contact, resistant stages, vectors and secondary hosts

Question 5

Describe resistant stages

Answer 5

Some parasites have stages in their lifecycle resistant to adverse environmental conditions and are able to survive for long periods of time

Question 6

What is a vector

Answer 6

A carrier which allows a parasite to pass from one host to another

Question 7

some parasitic life cycles have evolved to have _____?

Answer 7

secondary hosts