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प्रश्न
Skeleton is made entirely of cartilage in
पर्याय
Sharks
Tuna
Rohu
None of these
उत्तर
Sharks
Explanation -
The cartilaginous fish bear a cartila¬ginous endoskeleton i.e. the endoskeleton which is made entirely of cartilage, e.g. sharks (Scoliodon, etc.)
In the bony fish, the endoskeleton is cartilaginous in the embryonic stage, but in adults, it is replaced by bones. Thus they have a bony endoskeleton, e.g., Rohu, Tuna etc.
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संबंधित प्रश्न
What is the primary characteristic on which the first division of organisms is made?
Which organisms are called primitive and how are they different from the so-called advanced organisms?
Will advanced organisms be the same as complex organisms? Why?
Characters of a phylum are given below. Read those carefully and answer the questions.
a. Spines of calcium carbonate are present on the body.
b. These animals are exclusively marine.
c. They perform the locomotion with the help of tube feet.
d. Their skeleton is made up of calcareous plates or spicules.
i. Animals of which phylum show the above characters?
ii. Give an example from that phylum.
iii. These animals can be classified with the help of which criteria of new system of animals classification?
State any four benefits of animal classification.
With the help of flow chart depict five kingdoms classification.
Describe the characteristics used in hierarchial classification of organisms.
Briefly describe the importance of classification.
Give advantages of classification of animals.
Complete the flow chart.
