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?
ecological relationships

1. refer to the fungus and algae relationship in model 2.

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

1. refer to the shark and remora relationship in model 2.

a. in the shark and remora relationship, is there a benefit for one of the organisms or for both?

Explanation:

a. In the dog - flea relationship, fleas benefit by feeding on the dog's blood, while the dog does not benefit. In the fungus - algae relationship (lichen), both benefit as algae perform photosynthesis providing food and fungus provides structure and protection. In the shark - remora relationship, remora benefits by getting food scraps and transportation, while the shark is not significantly benefited.
b. In the dog - flea relationship, the dog is harmed as fleas cause itching, skin irritation and can transmit diseases. In the fungus - algae relationship, neither is harmed. In the shark - remora relationship, the shark is not harmed.
c. Without knowing all relationships in Model 2, generally, a parasitic relationship like dog - flea would be similar to other parasite - host relationships in Model 2. A mutualistic relationship like fungus - algae would be similar to other mutualistic relationships. A commensal relationship like shark - remora would be similar to other commensal relationships.

Answer:

9.
a. Only the flea benefits.
b. The dog is harmed.
c. Other parasite - host relationships in Model 2 (if any).
10.
a. Both benefit.
b. Neither is harmed.
c. Other mutualistic relationships in Model 2 (if any).
11.
a. Only the remora benefits.