Question 1

Which type of interaction involves one species being harmed while the other remains unaffected?

Accepted Answer

Amensalism. Amensalism occurs when one organism is inhibited or destroyed while the other stays neutral. A common example is a large tree shading out a small plant. This interaction is often represented by a (-/0) relationship.

Question 2

The interaction between a remora fish and a shark is a classic example of which relationship?

Accepted Answer

Commensalism. In commensalism, the remora benefits by getting food scraps and transport while the shark is unaffected. The remora attaches itself to the shark using a specialized sucker. This is categorized as a (+/0) biotic interaction.

Question 3

What is the term for a relationship where both participating species derive benefits?

Accepted Answer

Mutualism. Mutualism is a positive interspecific interaction where both species gain from each other. Pollination of flowers by bees is a prime example of this type. It is essential for the survival of many ecosystems.

Question 4

In which interaction does one organism live on or inside another organism, causing it harm?

Accepted Answer

Parasitism. Parasitism involves a parasite obtaining nourishment from a host organism. The host is typically harmed but not immediately killed. This interaction is designated as a (+/-) relationship.

Question 5

Which of the following describes the interaction known as 'Competition'?

Accepted Answer

Both are harmed. Competition occurs when different organisms vie for the same limited resources like food or space. Both species face a reduction in fitness because the resource is shared. It is represented as a (-/-) interaction in ecology.

Biotic Interaction — Set 1