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Subject :IEO    Class : Class 9

Read the passage and answer the questions that follow.
Scientists in Iceland and Denmark confirm existence of a narwhal-beluga hybrid whale (narluga - a mash up of both names together) through tests on a 30-year-old skull. The skull was originally found by a hunter in Greenland and stored at the Natural History Museum of Denmark.
In a 1993 study, researchers at the Society of Marine Mammalogy thought the skull belonged to a hybrid whale because of its unusual teeth and size. Narwhals have only one or rarely two long spiraling tusks whereas belugas can have up to 40 pointed teeth in straight rows. The hybrid skull had a mix of both - a set of long, spiraling and pointy teeth. It was also larger in size than a narwhal or a beluga skull. But at the time, lack of DNA knowledge kept the skull's owner in the dark, until recently, when a new study was published in Scientific Reports that finally uncovered the truth.
The findings proved it belonged to a hybrid offspring with a narwhal for its mother and a beluga for its father. "Even with the absence of a tusk and different mating systems, successful mating can still occur between a male beluga and a female narwhal," the study said. Normally, scientists have a hard time observing both narwhals and belugas during their mating season (late winter to late spring). However, there are a few places where there is enough population of both marine animals. Disko Bay, where the skull was discovered, is one of them. Scientists believe this skull might be the only evidence that proves narlugas exist.
They used powdered bone samples from 18 narwhals and 18 belugas skulls and compared the skull to the DNA found from eight narwhals and eight belugas from Greenland. And voila! A 30-yearold skull's story makes way for a new scientific discovery.
This is not the only mix of species that has happened, but it is the first-time cross breeding has been proved in marine life. One reason for this is the fact that the evidence is so difficult to find and often when it is, it is found by hunters who destroy it.

Scientists think the skull may be ______.

Afake
Bunique
Ca juvenile
Done of many


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