Ultrasonic Scaling Devices Operate at a Frequency Between

question 11

Multiple Choice

Ultrasonic scaling devices operate at a frequency between

• A) 3,000 and 8,000 cps
• B) 8,000 and 10,000 cps
• C) 15,000 and 18,000 cps
• D) 18,000 and 50,000 cps

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Definitions:

Keystone Species

A species that has a disproportionately large effect on community structure relative to its abundance.

Evolved

The process through which species undergo changes over time, often through genetic variation and natural selection, leading to adaptations and diversity among organisms.

Competitive Exclusion

A principle stating that two species competing for the same resources cannot stably coexist if other ecological factors are constant; one will always outcompete the other.

Paramecium

A genus of unicellular ciliates, commonly studied as a representative of the ciliate group.