Question

barnacles often attach themselves to whales. they travel around with the whales in this manner. there is no benefit for the whales. this relationship is best described as
parasitism
competition
commensalism
question 3
1 pts
a dog has a tapeworm living in its intestines. this relationship is an example of
competition
mutualism
parasitism

Explanation:

In the first - case, barnacles attach to whales and benefit (by getting transportation and access to food in the water currents around the whale) while whales neither benefit nor are harmed. This is commensalism. In the second - case, a tapeworm living in a dog's intestines benefits by getting nutrients from the dog, while the dog is harmed. This is parasitism.

Answer:

First question: C. commensalism
Second question: C. parasitism