Question

1. barnacles sometimes live on the outside surface of other larger shelled organisms without causing any harm. what is the ecological relationship?

a. mutualism
b. parasitism
c. predator - prey
d. commensalism

1. cows and sheep both eat the same types of food in areas of maryland. what is the ecological relationship?

a. parasitism
b. competition
c. cooperation
d. commensalism

1. ants protect soft bodied aphids and in return the aphids feed the ants a sugary drink. what is the ecological relationship?

a. mutualism
b. competition
c. cooperation

Explanation:

• In question 4, barnacles benefit from living on larger shelled organisms without harming them, which is commensalism.
• In question 5, cows and sheep compete for the same food resources, so it's competition.
• In question 6, ants and aphids help each other, which is mutualism.

Answer:

1. d. Commensalism
2. b. Competition
3. a. Mutualism