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प्रश्न
Give scientific reason
All vertebrates are chordates but all chordates are not vertebrates.
उत्तर १
The members of Vertebrata possess notochord during embryonic development. Thus, all vertebrates are chordates. However, the notochord gets replaced by a cartilaginous or bony vertebral column in the adult. Thus, all chordates are not vertebrates.
उत्तर २
The pharyngeal gill slits and notochord are the defining characteristics of the phylum Chordata. The notochord is only present in the larval stages of Urochordata and is missing in the adult stages. The notochord remains present throughout life in Cephalochordata. However, when we look at vertebrates, the notochord is eventually replaced by a bony or cartilaginous vertebral column in adulthood. Only in the embryos of vertebrate animals is the notochord present. As a result, all vertebrates are chordates but all chordates are not vertebrates.
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संबंधित प्रश्न
Complete the following chart.
| Type | Character | Example |
| Cyclostomata | ||
| Gill respiration | ||
| Amphibia | ||
| Whale | ||
| Poikilotherms |
Sketch, labell and classify Shark .
Sketch, labell and classify Frog .
Label the following.
Find an odd one out.
Find an odd one out.
Write any one cold-blooded animal you know.
What are the animals having vertebral columns in their body called as?
Which animal doesn’t have a neck?
Distinguish between Class Aves and Class Mammalia.
Distinguish between Class Pisces and Class Amphibia.
We are Crocodile and Alligator.
To which phylum we belong to?
______ are jawless vertebrates.
______ is the unique characteristic feature of mammal.
Spiny anteater is an example for ______ mammal.
State whether true or false. If false, correct the statement.
Fishes have two chambered heart
State whether true or false. If false, correct the statement.
Wings of birds are the modified forelimbs.
State whether true or false. If false, correct the statement.
Female mammals have mammary glands.
Read the statements and answer accordingly:
My body is spindle shaped. I respire with the help of gills.
- Identify my class and give one example.
