The Symbols +, −, and 0 Are to Be Used

question 20

Multiple Choice

The symbols +, −, and 0 are to be used to show the results of interactions between individuals and groups of individuals in the examples that follow. The symbol + denotes a positive interaction, − denotes a negative interaction, and 0 denotes where individuals are not affected by interacting. The first symbol refers to the first organism mentioned.
- What does the graph in the accompanying figure tell you about the definition of a keystone species?

• A) A keystone species has little interaction with other species in an environment.
• B) Removing a keystone species from the community drastically reduces diversity.
• C) Adding a keystone species to the community will make it more diverse.
• D) Removing a keystone species from the community will eventually allow for the invasion of a new species.

---

Definitions:

Instructions

Directions or orders given by one party to another, especially in the context of executing a task or procedure.

Purchase Price

The amount of money paid to buy a product or service.

Confidential Information

Data or knowledge which is not meant to be disclosed to the public, often protected by law or contract due to its sensitive nature.

Economic Loss

Financial loss experienced by an individual or entity, which can include lost profits, costs of repair, or decrease in value of assets.