Beneficial and Harmful Interactions Among Living Things

What is the study of the interaction of living things with one another and its environment?

• community

• ecosystem

• ecology

• population

What type of interaction in which both organisms benefit from each other.

• commensalism

• competition

• mutualism

• parasitism

There are different species of animals and plants living together in the same environment. How is this organization classified?

• association

• ecology

• community

• population

Which of the following pairs of organisms has harmful interaction?

• a snake and a rat

• orchids and trunk of a tree

• a bird's nest and a tree

• butterflies and flowers

What makes the ecosystem as a unit of interactions?

• a system that helps animals survive in the environment

• all of the biotic and abiotic factors in an area

• a place with a bunch of dead organisms

• a relationship among organisms.

What type of interaction in which organism kills the smaller organism for food?

• competition

• predation

• parasitism

• mutualism

What type of interaction in which two or more organisms compete for survival?

• commensalism

• competition

• parasitism

• predation

What type of interaction among organisms where one benefits while the other is not benefited or harmed?

• mutualism

• parasitism

• commensalism

• predation

It is a symbolic relationship where one organism depends on the host for food, protection and reproduction.

• commensalism

• competition

• mutualism

• parasitism

One example of commensalism is when the plant like fern attached to a branch of a tree. Why is the interaction called commensalism?

• Both a branch of a tree and a fern benefit from each other.

• Only a branch of a tree has benefited from the relationship

• A fern benefits from the relationship while a branch of a tree, neither harmed nor benefited

• They compete with each other.