Topic 5: Symbiosis

Question 1

What is a symbiotic relationship?

Answer 1

coevolved intimate relationships between members of two different species

Question 2

how does a parasite benefit?

Answer 2

it gains energy and/or nutrients from the host

Question 3

how is a host harmed?

Answer 3

by a LOSS of energy and/or nutrients

Question 4

What is the limitation of most parasites?

Answer 4

limited metabolism so they cannot survive out of contact with a host

Question 5

By what means can parasite be transmitted to new hosts?

Answer 5

Direct contact, resistant stages, vectors

Question 6

Some parasitic lifecycles involve ________ hosts

Answer 6

intermediate (Secondary)

Question 7

What are the benefits of an intermediate host to a parasite?

Answer 7

To complete their life-cycle

Question 8

What are some examples of parasites and their intermediate host?

Answer 8

Tapeworm and pig, plasmodium and human

Question 9

How do both mutualistic partner species benefit from each other?

Answer 9

Through an interdependent relationship

Question 10

What are examples of ritualistic partner species in an interdependent relationship?

Answer 10

Bacteria and guts of many herbivores, Cellulose digesting protozoa