DENDROLOGY

Detailed explanation-1: -The sharks, rays, and chimaeras make up the second group of fish, the Class Chondrichthyes. Sharks are one of the earliest known jawed fishes. They have an upper and lower jaw made of cartilage.

Detailed explanation-2: -Sharks are fish, even though some people believe they are mammals due to how big some of them can get and because some give birth to live young. Fish are aquatic animals that were among the first vertebrates (animals with a backbone) to evolve on earth.

Detailed explanation-3: -A group of sharks is called a shiver. For a group of sharks, there is no one conventional name to refer to them as one. Nevertheless, shiver, frenzy, herd, gam, shoal, grind, shoal, or college are used to describe sharks collectively. But, a group of dolphins and whales are collectively called a “school” or “pod.”

Detailed explanation-4: -Sharks are classed as vertebrates, which means that they have a backbone.