2.) Populations co-evolve

Question 1

Why do predators catch old and weak?

Answer 1

Co-evolves with their prey: selection favors predators that catch prey and prey that can avoid predators: both prey and predators get faster/ better defence/stronger

Question 2

Human effects on evolution:

Answer 2

artificial selection weakens species: -example 1 hatchery fish: by releasing these we change the nature of fish pops
-example 2 fishing: nets catch larger, fatter fish: opposite of natural selection: in response, small, slow growing fish survive, opposite of what is desired.

Question 3

Inadvertent/advetrent evolutionary effects of human intervention:

Answer 3

Inadvertent effects -caused by repeated pesticide/antibiotic application results in more resistant pests. causes an evolution of resistance.
advertent: domestication of plants and animals.