Question

1. refer to the information given in model 2.

a. in the dog and flea relationship, is there a benefit for one of the organisms or for both?
b. is either the dog or the flea harmed by this relationship?
c. which other relationship in model 2 is similar to that between the dog and flea?

Explanation:

a. The flea benefits as it feeds on the dog's blood for nutrition. The dog does not benefit.
b. The dog is harmed as the flea's bites can cause itching, skin irritation and may transmit diseases. The flea is not harmed by the relationship itself.
c. Without seeing Model 2, a similar relationship would be a tick - animal relationship where the tick feeds on the animal's blood, harming the animal while benefiting itself.

Answer:

a. The flea benefits, the dog does not.
b. The dog is harmed, the flea is not.
c. Without Model 2 details, a tick - animal relationship is similar.