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Exercise "Seahorses", created by anonyme (a free exercise to learn English):
Results of the 1 638 people who have taken this test:
Average mark: 56 / 100 Share
Latest member with a 100/100 (perfect mark): ploplo / SWITZERLAND, on Monday 16 September - 14:32:
"!! Thanks a lot for the exercise !!"
They got a perfect mark
Stats (1066 candidates)
Question 1 passed: 61.4 %
How did the * get its shape?
Question 2 passed: 70.5 %
A new study published in the journal 'Nature Communications' explains how the seahorse's * trunk,
Question 3 passed: 86.7 %
bent head and long snout help it to * food.
Question 4 passed: 49.4 %
Seahorses evolved from * swimmers like these pipefish.
Question 5 passed: 58.5 %
To work out why such a * might become S-shaped,
Question 6 passed: 67.5 %
researchers Sam Van Wassenbergh, Gert Roos and Lara Ferry compared the way pipefish feed with the way seahorses capture their *
Question 7 passed: 54.7 %
Both pipefish and * feed on small shrimp and larval fishes
Question 8 passed: 81.1 %
which they * in a two-stage process called 'pivot feeding'.
Question 9 passed: 60.8 %
This slow-motion footage taken by the * shows how they rapidly rotate the head upwards
Question 10 passed: 61.4 %
then use suction to draw the * into their mouth.
Question 11 passed: 55.4 %
But the * only works over short distances
Question 12 passed: 57.2 %
so you have to move your *
Question 13 passed: 80.7 %
very close very quickly to make a *.
Question 14 passed: 39.8 %
The researchers found that the * unique anatomy
Question 15 passed: 56.7 %
increases its *: the distance between the eyes that spy dinner
Question 16 passed: 58.2 %
and the * that eats it.
Question 17 passed: 47.9 %
This animation shows how its S-shaped body enables the *
Question 18 passed: 52.9 %
to reach further forward for its *
Question 19 passed: 30.8 %
compared with the * pipefish. It's subtle, but small changes like this drive evolution.
Question 20 passed: 52.8 %
In the wild, * tend to hide along the edges of reefs
Question 21 passed: 50.8 %
or in * beds and wait for
Question 22 passed: 49.3 %
their * to swim by. They often attach themselves
Question 23 passed: 48.8 %
to the * for camouflage
Question 24 passed: 34.7 %
as they *.
Question 25 passed: 49 %
In this case, an increased * is clearly an advantage.
Question 26 passed: 53.5 %
Pipefish, on the other hand, generally swim towards their prey so * is less important.
Question 27 passed: 42.6 %
That's why, it seems, an S-shaped body evolved alongside a * strategy in seahorses.
Question 28 passed: 58.1 %
And that's how the seahorse got its * shape.
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