Learn English > English lessons and exercises > English test #88199: Seahorses

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Seahorses

Choose the correct response.

Pay attention to words which are pronounced the same but mean something different.

For example: seahorses vs seahorse's

You must understand the context in order to make the correct choice.

Some responses are used more than once.

Good luck!

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28 answers are available. Please use the small bar on the right of the answers to see all of them.

How did the get its shape? A new study published in the journal 'Nature Communications' explains how the seahorse's trunk, bent head and long snout help it to food.

Seahorses evolved from swimmers like these pipefish. To work out why such a might become S-shaped, researchers Sam Van Wassenbergh, Gert Roos and Lara Ferry compared the way pipefish feed with the way seahorses capture their

Both pipefish and feed on small shrimp and larval fishes which they in a two-stage process called 'pivot feeding'. This slow-motion footage taken by the shows how they rapidly rotate the head upwards then use suction to draw the into their mouth. But the only works over short distances so you have to move your very close very quickly to make a .

The researchers found that the unique anatomy increases its : the distance between the eyes that spy dinner and the that eats it.

This animation shows how its S-shaped body enables the to reach further forward for its compared with the pipefish. It's subtle, but small changes like this drive evolution.

In the wild, tend to hide along the edges of reefs or in beds and wait for their to swim by. They often attach themselves to the for camouflage as they . In this case, an increased is clearly an advantage.

Pipefish, on the other hand, generally swim towards their prey so is less important. That's why, it seems, an S-shaped body evolved alongside a strategy in seahorses. And that's how the seahorse got its shape.

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