Features of Fish: What Is a Fish?

The video explores vertebrates, a group of animals with backbones, and their classification within the phylum Chordata. It highlights the shared characteristics of chordates, such as a dorsal hollow nerve cord and a notochord. The video also delves into the structure of vertebrates, including their spinal column and vertebrae. It further examines the distinct classes of vertebrates, focusing on fishes, their adaptations for aquatic life, and their ectothermic nature.

Which of the following animals is classified as a vertebrate?

• Jellyfish

• Octopus

• Alligator

• Earthworm

What is one of the four main characteristics shared by all chordates?

• Scales

• Dorsal hollow nerve cord

• Exoskeleton

• Feathers

In the early stages of human development, which feature is present but later disappears?

• Fins

• Gills

• Wings

• Tail

What distinguishes vertebrates from other chordates?

• Laying eggs

• Having scales

• Presence of a backbone

• Ability to fly

How do ectothermic animals regulate their body temperature?

• By basking in the sun

• By eating more

• By sweating

• By shivering