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
competition
commensalism
parasitism
question 3
1 pts
a dog has a tapeworm living in its intestines. this relationship is an example of
parasitism
mutualism
competition

Explanation:

1. In the first case, barnacles attaching to whales and getting a free - ride without benefiting or harming the whales is commensalism. Commensalism is a symbiotic relationship where one organism benefits and the other is neither helped nor harmed.
2. In the second case, a tapeworm living in a dog's intestines and getting nutrients at the expense of the dog's health is parasitism. Parasitism is a symbiotic relationship where one organism (the parasite) benefits and the other (the host) is harmed.

Answer:

1. B. commensalism
2. A. parasitism