KA5- SYMBIOSIS

Question 1

what are the 2 types of symbiosis?

Answer 1

1. parasitism
2. mutualism

Question 2

What is symbiosis?

Answer 2

A relationship between 2 different species in direct contact with one another

Question 3

mutualism

Answer 3

both organisms benefit from this relationship (+/+)
interdepend on one another and benefit from their relationship

Question 4

parasitism

Answer 4

the parasite benefits at the expense of the host who is often damaged (+/-)

Question 5

describe the relationship between host and parasite

Answer 5

stable as the parasite cannot survive without host due to their limited metabolism

Question 6

name the types of parasites

(inside and outside)

Answer 6

endoparasites
ectoparasites

Question 7

what are the 3 ways parasites are transmitted?

Answer 7

• direct contact
• release of resistant stages
• use of a vector

Question 8

what does release of resistant stages mean?

Answer 8

a stage in the life cycle that can withstand adverse enviromental conditions until they come into contact with a new host

Question 9

what does the use of a vector mean?

Answer 9

using another animal to carry the parasite to its host

example is a mosquitoe

Question 10

describe parasitic life cycles

Answer 10

can include more than one host