A Certain Species of Animal Represents Just 3% of the Biomass

question 109

Multiple Choice

A certain species of animal represents just 3% of the biomass in its ecosystem. We might classify this as a keystone species if its removal:

• A)allowed an even rarer species to increase in numbers and take its place.
• B)caused 2% of the other species in the community to disappear.
• C)caused the diversity of the plant community to decline by 40%.
• D)caused plant biomass to increase by 5%.
• E)had no effect on the community whatsoever.

---

Definitions:

Flow Rate

The volume of fluid passing through a point or surface per unit time, often used in various scientific and engineering contexts.

Drug Y

A hypothetical or placeholder name for a medication or substance not specified.

Flow Rate

The volume of fluid that passes a certain point in a specified period of time, often measured in liters per minute.

Micrograms Per Minute

A unit of measure indicating the flow rate of substances, such as medication, in micrograms over the course of a minute.