symbiosis + coevolution

Question 1

What is symbiosis

Answer 1

Dissimilarly named
organisms living together
antagonist vs mutualistic
any intimate association
close, often long-term

Question 2

the “metagenome”

Answer 2

Human gut symbionts

Question 3

important things

Answer 3

size
fitness costs + benefits
value + division of resources
virulence + parasite fitness

Question 4

Iteroparity vs semelparity

Answer 4

iteroparity - invests in maintenance
semelparity - invests in reproduction

Question 5

Types of interaction may change depending on

Answer 5

alternative resources
population densities
presence/abundance of other species

(through gene x environment or gene x gene interactions)

Question 6

Most between-species interactions involve

Answer 6

consumption defined based on size + tropic level

Question 7

Mutualistic interactions normally involve

Answer 7

reciprocal
exploitation of different resources with different
values to partners.

Question 8

Coevolution

Answer 8

“The joint evolution of two species, with
each responding to selection imposed by the other”

requires
- reciprocal selection
-long-term intimate association
-pairwise or diffuse

Question 9

outcome of coevolution between mimics will depend on

Answer 9

starting point and the relative rates of change

(same for parasite-host)

Question 10

Coevolution is NOT simply:

Answer 10

Adaptation to another species
Co-speciation
Co-adaptation

requires change in both partners in
response to changes in the other.