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Scientists now know the secrets of the seahorse. They worked out its genetic map. Scientists can now find out why seahorses are so different. They have no teeth. Male seahorses give birth to babies. Seahorses do not swim forwards or to the left and right. They swim vertically (up and down).

Seahorses got their unusual shape 100 million years ago. There are 54 kinds of seahorses. The scientific name for a seahorse is Hippocampus. This word comes from the ancient Greek words hippos (horse) and kampos (sea monster). We can write seahorse as two words (sea horse), or with a dash (sea-horse).

1.What’s the Chinese meaning of the underlined words “genetic map”?

A 遗传图谱.

B 遗传秘密.

C 遗传科学.

D 遗传基因.

解析：选A。词义猜测题。由map可以推测出应该是“遗传图谱”，故选A。

2.What do scientists find out?

A They find out why seahorses are so cool.

B They find out why seahorses are so beautiful.

C They find out why seahorses are so different.

D They find out why seahorses are so delicious.

解析：选C。细节理解题。根据第一段第三句Scientists can now find out why seahorses are so different.可知，故选C。

3.Who gives birth to baby seahorses?

A Big seahorses.

B Female seahorses.

C Male seahorses.

D Small seahorses.

解析：选C。细节理解题。根据第一段第五句Male seahorses give birth to babies.可知，故选C。

4.How many kinds of seahorses are there?

A 51.

B 52.

C 53.

D 54.

解析：选D。细节理解题。根据第二段第二句There are 54 kinds of seahorses.可知，故选D。