Question

The symbiotic relationship in commensalism is best described as:

a. one partner benefits, the other one doesn't benefit and isn't harmed
b. one benefits at the expense (harm) of the other
c. both derive some benefit from being together
d. the older one has a greater commercial value

Answer 1

In commensalism, one species benefits while the other is neither harmed nor helped. This differs from mutualism, where both species benefit, and parasitism, where one benefits at the expense of the other. Therefore, the correct option is a.

Step-by-step explanation:

The symbiotic relationship in commensalism is best described as:

a. one partner benefits, the other one doesn't benefit and isn't harmed

This definition contrasts with the other forms of symbiosis, such as mutualism, where both species benefit, and parasitism, where one benefits at the expense of the other. An example of commensalism is when mites attach themselves to larger flying insects for transportation without affecting the insects.