BATS AND ECHOLOCATION

The word misguided can mean the following EXCEPT:

• foolish

• mistaken

• inaccurate

• disrespectful

When a person is ​ (a)   , he or she prefers working at night.

• nocturnal
• diurnal
• insomniac
• hyperactive

Bats use a combination of their voice, ears and echoes to create a

perceptual map that allows them to see in the dark.

PERCEPTUAL here can mean:

• sensational
• mental

• emotional
• physical

Sound is a vibration that ​ (a)   away from its source in waves.

• ripples
• gushes
• bubbles
• splashes

(a)   is determined by the frequency of vibration of

the sound waves that produce them.

• Pitch
• Volume
• Color
• ripple

Humans can hear sounds at frequencies between 20 and 20,000 waves per second

and don't ​ (a)   pitches outside that range.

• perceive
• ignore
• see
• comprehend

the cartilage of the outer ear ​ (a)   the sound waves into the ear canal.

• funnels
• magnifies
• absorbs
• attracts

Because a bat receives so much information at once,

it has to differentiate relevant information from signal clutter.

CLUTTER here means ​​ (a)  

• unwanted echoes
• loud noises
• messy surrounding
• confusing signals

Bats are able to ​ (a)   how far away an object is, so they can locate it.

• gauge
• see
• feel
• measure

The bat ​ (a)   chirps of varying frequency patterns.

• emits
• sings
• releases
• discharges