The Secret Sounds of Plants

Used infrasonic microphones to record plant sounds

Placed plants in soundproof boxes and used ultrasonic microphones (correct)

Exposed plants to loud noises and recorded with regular microphones

Watered the plants and used regular microphones

To test if plants can produce sounds in the absence of sunlight

To isolate the plants from insects and animals

To prevent the plants from making any sounds

To eliminate environmental noise and record the plants' sounds accurately (correct)

Between 200 and 2500 kilohertz

Between 20 and 250 kilohertz (correct)

Between 2 and 25 kilohertz

Between 200 and 2500 hertz

<p>They were one of the groups from which sounds were recorded (C)</p> Signup and view all the answers

<p>To capture sounds at frequencies beyond the range of human hearing (B)</p> Signup and view all the answers