Advertisements
Advertisements
प्रश्न
Which one is the most striking or (common) character of the vertebrates?
पर्याय
Presence of notochord
Presence of triploblastic condition
Presence of gill pouches
Presence of coelom
Advertisements
उत्तर
Presence of notochord
Explanation -
Notochord is a solid, unjointed, rod-like structure situated on the dorsal side between the dorsal, hollow nerve cord and the alimentary canal. Presence of notochord is one of the characteristic features of chordates including vertebrates. In vertebrates, notochord is only present in the embryonic stage, and is replaced by a cartilagenous or bony vertebral column in the adults.
APPEARS IN
संबंधित प्रश्न
Fill in the blank.
Cnidarians have ................ symmetrical body.
Fill in the blank.
The backbone of vertebrates is made up of a number of small bones called .....................
Differentiate between
radially symmetrical and bilaterally symmetrical body
Write a short answer.
Give two examples of Platyhelminthes.
Write a short answer.
What is an exoskeleton? How is it different from a backbone?
Classify the given animals into different categories indicated.
Crab, millipede, butterfly, ant, scorpion, centipede, spider, lobster, moth, prawn into arachnids, crustaceans, myriapods, and insects.
Mention any one major similarity and one major difference in the following pairs of an animal:
Insects and Birds
Which is not a feature of chordates?
Assertion (A): Mammals give birth to their young ones.
Reason (R): Platypus is an egg-laying mammal.
Write a note on mammals.
