2.2c - Co-evolution

Question 1

Co-evolution is…

Answer 1

the process by which 2 or more species evolve in response to selection pressures imposed by each other

Question 2

In co-evolution, a change in the traits if one species acts as…

Answer 2

a selection pressure on the other species

Question 3

Co-evolution is frequently seen in…

Answer 3

pairs of species that have symbiotic interactions

Question 4

Symbiosis is…

Answer 4

the co-evolved intimate relationship between members of two different species

Question 5

The impacts of symbiotic relationships can be…

Answer 5

positive(+), negative(-) or neutral(0) for the individuals involved

Question 6

3 types of symbiotic interactions

Answer 6

mutualism, commensalism and parasitism

Question 7

Mutualism:

Answer 7

Both organisms in the interaction are interdependent on each other for resources or other services. As both organisms in the interaction gain from the relationship, the interaction is (+/+)

Question 8

Commensalism:

Answer 8

Only one of the organisms benefit (+/0)

Question 9

Parasitism:

Answer 9

The parasite benefits in terms of energy or nutrients and the host is harmed as a result of the loss of these resources (+/-)

Question 10

The Red Queen Hypothesis states that…

Answer 10

in a co-evolutionary relationship, change in the traits of one species can act as a selection pressure on other species, meaning that species in these relationships must adapt to avoid extinction