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Consider the following statements regarding the Elasmobranch:
- These animals have a skeleton made of cartilage, rather than bone.
- These diverse species are found in the tropical and subtropical Indo-Pacific Ocean.
Which of the statements given above is/are correct?
- a)1 only
- b)2 only
- c)Both 1 and 2
- d)Neither 1 nor 2
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
Consider the following statements regarding the Elasmobranch: These an...
Explanation:
Cartilage Skeleton:
- Elasmobranchs, which include sharks, rays, and skates, have a skeleton made of cartilage instead of bone.
- This cartilaginous skeleton provides flexibility and is lighter than bone, allowing these animals to be more agile in the water.
Tropical and Subtropical Indo-Pacific Ocean:
- Elasmobranchs are incredibly diverse and can be found in various habitats worldwide.
- While some species are indeed found in the tropical and subtropical waters of the Indo-Pacific Ocean, they can also be found in other regions such as the Atlantic and Arctic Oceans.
Conclusion:
Both statements are correct. Elasmobranchs do have a skeleton made of cartilage, and they can be found in the tropical and subtropical Indo-Pacific Ocean, among other regions.
Cartilage Skeleton:
- Elasmobranchs, which include sharks, rays, and skates, have a skeleton made of cartilage instead of bone.
- This cartilaginous skeleton provides flexibility and is lighter than bone, allowing these animals to be more agile in the water.
Tropical and Subtropical Indo-Pacific Ocean:
- Elasmobranchs are incredibly diverse and can be found in various habitats worldwide.
- While some species are indeed found in the tropical and subtropical waters of the Indo-Pacific Ocean, they can also be found in other regions such as the Atlantic and Arctic Oceans.
Conclusion:
Both statements are correct. Elasmobranchs do have a skeleton made of cartilage, and they can be found in the tropical and subtropical Indo-Pacific Ocean, among other regions.
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Community Answer
Consider the following statements regarding the Elasmobranch: These an...
The meat of sharks and rays (Elasmobranch), for long consumed by tribal and coastal people in India, has found favour among new demographic categories such as foreign tourists and Indian middle- and upper classes.
- The term elasmobranch refers to the sharks, rays, and skates.
- These animals have a skeleton made of cartilage, rather than bone.
- The other subclass of cartilaginous fish, the Holocephali, consists of Chimaeras – ratfish (Genus Chimaera) and elephantfish (Genus Callorhynchus).
- The main differences between these two subclasses are the structure of their gills and how they grow in the embryo.
- Holocephali has four gill slits with a gill cover (an operculum), while Elasmobranchs have five to seven external gill slits with no gill cover.
- Characteristics of Elasmobranchs
- Its skeleton is made of cartilage rather than bone.
- They have five to seven gill openings on each side.
- Rigid dorsal fins (and spines if present)
- Spiracles to aid in breathing
- The upper jaw of elasmobranchs is not fused to their skull.
- Elasmobranchs have several rows of teeth which are continually replaced.
- They don't have swim bladders, but instead their large livers are full of oil to provide buoyancy.
- They reproduce sexually with internal fertilization and either bear live young or lay eggs.
- Elasmobranch skin is made of tiny, hard, tooth-like placoid scales called denticles.
- These are renowned for their highly tuned senses, which make them incredibly successful in their environment.
- Their distribution ranges from near shore regions to the deep oceanic waters.
- Some species are known to travel long distances, hence can be considered as highly migratory. Their stock can be found in more than one Exclusive Economic Zone (EEZ)
- They are widely distributed in the Oceans but are most diverse in the tropical and subtropical Indo-Pacific Ocean.
Hence both statements are correct.
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Consider the following statements regarding the Elasmobranch: These animals have a skeleton made of cartilage, rather than bone. These diverse species are found in the tropical and subtropical Indo-Pacific Ocean.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'C'. Can you explain this answer?
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