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Q: Which of the following is a vertebrate?
  • A. Snake
  • B. Roundworm
  • C. Millipede
  • D. Earthworm
Correct Answer: Option A - All chordates have spinal cord or noto chord. Frog, Snake, Humans, crocodile all are chordates. They have true notochord and skeleton. Because of this the muscles are distributed and are attached with skeletons which help them in locomotion.
A. All chordates have spinal cord or noto chord. Frog, Snake, Humans, crocodile all are chordates. They have true notochord and skeleton. Because of this the muscles are distributed and are attached with skeletons which help them in locomotion.

Explanations:

All chordates have spinal cord or noto chord. Frog, Snake, Humans, crocodile all are chordates. They have true notochord and skeleton. Because of this the muscles are distributed and are attached with skeletons which help them in locomotion.