Sorry, I didn't quite catch that.
The one sense all vertebrates use
(0) ........... ..11> ........... a means of identifying
potential danger is hearing,
(9) ................................. there are examples of
blind vertebrates, there seem to be no
instances of naturally deaf ones, and
animals can hear things around them
no (10) ............... , ..... " ...... what they are doing,
Hearing (11) ... into its own,
however, with underwater creatures.
Light only travels a short distance
underwater before it disappears,
(12) ............................. limits the value of sight
for sea creatures. Conversely, sound
travels faster and further than it does
in the air, and any noises sea animals
produce can be heard (13) ,.
miles, Ironically, this causes problems as
the underwater world is generally noisy
and (14) ............................ can be confusing
echoes; sea creatures have to sort
through these to isolate a message meant
(15) .......................... them. Marine animals
use sound to navigate, communicate
and locate food, so (16) .......................... this
sense, they would be unable to function
effectively.
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Sinh Học lớp 12
