Whale sharks, and all sharks, belong tothe group of fishcalled thecartilaginous fish- fish that have a skeleton made of cartilage, rather than bone.Other cartilaginous fishinclude theskatesand rays. The second-largest fish is another plankton-eating cartilaginous fish - thebasking shark. The baski...
文中第二段提到“Unlike bony fish,sharks have no bones;their skeleton is made of cartilage (软骨),which is a tough,fibrous(纤维性质的)substance,not nearly as hard as bone.”也就是说,与多骨鱼类不同,鲨鱼没有骨头,它们的骨骼是由坚韧、纤维性质的软骨构成,不像骨头那样硬。故[C]“骨头”正确。
ANNIE:Many fish have skeletons made of bone, just like we do. Onscreen, Annie and Moby look at a yellowtail snapper fish swimming in its tank. An outline of the fish’s skeleton appears, showing all of its bones. ANNIE:But fish like sharks and rays have bodies made of cartilage. Part...
sharks have no bones; theirskeleton (骨架) is made of cartilage(软骨), which is not as hard as bone.T here are many different species of sharksthat range in size from the size of a person'shand to bigger than a bus. T
Bony fish –Have a skeleton made of bone, scales on the outer of their body and a single pair of gill openings. The majority of fishes are categorised as bony fish with over 20,000 species in total. Herring and Tailor are an example of bony fish.Cartilaginous fish –Have a skeleton ...
Most fish have a skeleton made of bone but some, like sharks, have a skeleton made of cartilage. Fish spend all their lives in the water and are cold-blooded with the exception of Tuna family and the Mackerel shark family. Scientists believe that there are more than 25,000 different ...
Some types ofsomerivers and lakes.shark are very rare (like the great white shark and theUnlike bony fish, sharks have no bones; theirmegamouth) and some are quite common ( like theskeleton(骨架)is made of cartilage(软骨),which isdogfish shark and bull shark).not nearly as hard as bone...
Cartilaginous fish can technically refer to any species or group of fish that have cartilage in their skeletons rather than bone. However, scientists prefer to use this term to only refer to the cartilaginous fish of the class Chondrichthyes and refer to the class Agantha as jawless fish. ...
Unlike bony fish, sharks have no bones; their skeleton (骨架)is made of cartilage (软骨), which is not nearly as hard as bone. There are many different species (种类) of sharks that range in size from the size of a person's hand to bigger than a bus. Fully-grown sharks range in ...
skeleton of cartilage, not bone. Mola can weigh up to 5,000 pounds (2,268 kilograms). Thys lists other unique characteristics of mola. “It produces more eggs in one individual than any other vertebrate on the planet. It’s the growth champion of the world, so that from hatching size...