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There is a line in 12th ncert about homologous organs in pg:130 - '' Other examples are vertebrate heart or brains '' while we all know that hearts of vertebrates have different structures( i.e, they are 2,3, and 4- chambered) and they perform the same function of circulation so why they are not the examples of analogous organs??? PLEASE EXPLAIN IN DETAIL?
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There is a line in 12th ncert about homologous organs in pg:130 - '' ...
The heart of vertebrate is homologous because their origin is similar and both have auricle and ventricle. For example in fish one auricle and one ventricle, so two chambered heart but in crocodile it is two auricles and a ventricle which is partially divided to form two ventricles. Though the number of auricle and ventricle is different but the origin remains the the same. And due to presence of different number of chambers the function differently.
Same goes with the brain, some has only midbrain and hindbrain while some has fore, mid and hind brain. Therefore origin remains the same bit function is different.
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There is a line in 12th ncert about homologous organs in pg:130 - '' ...
They all originated from the common ancestor so it can be said that they have same origin so homologous structure....
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There is a line in 12th ncert about homologous organs in pg:130 - '' ...
Homologous Organs vs Analogous Organs
Homologous organs are those organs that have a similar basic structure and origin but may have different functions in different organisms. On the other hand, analogous organs are those organs that have different structures and origins but perform similar functions in different organisms.
Explanation of the Statement in NCERT Textbook
In the 12th NCERT textbook on page 130, there is a line that says, "Other examples are vertebrate heart or brains." This statement might seem confusing because the hearts of vertebrates have different structures, such as being two, three, or four-chambered. However, it is important to understand the context in which this statement is made.
Understanding the Function and Structure of Vertebrate Hearts
While it is true that the hearts of vertebrates have different structures, they all perform the same function, which is the circulation of blood. The different structures of vertebrate hearts represent adaptations to different environments and lifestyles. For example, fish have a two-chambered heart, amphibians have a three-chambered heart, and mammals and birds have a four-chambered heart.
Analogous Organs vs Homologous Organs
In the case of the vertebrate hearts, they are considered as homologous organs because they share a common basic structure and developmental origin, which is the pharyngeal arches in the embryo. The differences in their structures are due to evolutionary adaptations to different environments.
If the statement in the NCERT textbook had referred to the hearts of different species, such as a bird's heart and a mammal's heart, then it would have been an example of analogous organs. Analogous organs are organs that have different structures and origins but perform similar functions in different organisms.
Conclusion
In conclusion, the statement in the 12th NCERT textbook about vertebrate hearts as homologous organs is correct. Although vertebrates have hearts with different structures, the underlying similarity in their basic structure and origin makes them homologous organs. The different structures of vertebrate hearts represent adaptations to different environments and lifestyles, while still performing the same function of circulating blood.
Homologous organs are those organs that have a similar basic structure and origin but may have different functions in different organisms. On the other hand, analogous organs are those organs that have different structures and origins but perform similar functions in different organisms.
Explanation of the Statement in NCERT Textbook
In the 12th NCERT textbook on page 130, there is a line that says, "Other examples are vertebrate heart or brains." This statement might seem confusing because the hearts of vertebrates have different structures, such as being two, three, or four-chambered. However, it is important to understand the context in which this statement is made.
Understanding the Function and Structure of Vertebrate Hearts
While it is true that the hearts of vertebrates have different structures, they all perform the same function, which is the circulation of blood. The different structures of vertebrate hearts represent adaptations to different environments and lifestyles. For example, fish have a two-chambered heart, amphibians have a three-chambered heart, and mammals and birds have a four-chambered heart.
Analogous Organs vs Homologous Organs
In the case of the vertebrate hearts, they are considered as homologous organs because they share a common basic structure and developmental origin, which is the pharyngeal arches in the embryo. The differences in their structures are due to evolutionary adaptations to different environments.
If the statement in the NCERT textbook had referred to the hearts of different species, such as a bird's heart and a mammal's heart, then it would have been an example of analogous organs. Analogous organs are organs that have different structures and origins but perform similar functions in different organisms.
Conclusion
In conclusion, the statement in the 12th NCERT textbook about vertebrate hearts as homologous organs is correct. Although vertebrates have hearts with different structures, the underlying similarity in their basic structure and origin makes them homologous organs. The different structures of vertebrate hearts represent adaptations to different environments and lifestyles, while still performing the same function of circulating blood.
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There is a line in 12th ncert about homologous organs in pg:130 - '' Other examples are vertebrate heart or brains '' while we all know that hearts of vertebrates have different structures( i.e, they are 2,3, and 4- chambered) and they perform the same function of circulation so why they are not the examples of analogous organs??? PLEASE EXPLAIN IN DETAIL?
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There is a line in 12th ncert about homologous organs in pg:130 - '' Other examples are vertebrate heart or brains '' while we all know that hearts of vertebrates have different structures( i.e, they are 2,3, and 4- chambered) and they perform the same function of circulation so why they are not the examples of analogous organs??? PLEASE EXPLAIN IN DETAIL? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about There is a line in 12th ncert about homologous organs in pg:130 - '' Other examples are vertebrate heart or brains '' while we all know that hearts of vertebrates have different structures( i.e, they are 2,3, and 4- chambered) and they perform the same function of circulation so why they are not the examples of analogous organs??? PLEASE EXPLAIN IN DETAIL? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for There is a line in 12th ncert about homologous organs in pg:130 - '' Other examples are vertebrate heart or brains '' while we all know that hearts of vertebrates have different structures( i.e, they are 2,3, and 4- chambered) and they perform the same function of circulation so why they are not the examples of analogous organs??? PLEASE EXPLAIN IN DETAIL?.
There is a line in 12th ncert about homologous organs in pg:130 - '' Other examples are vertebrate heart or brains '' while we all know that hearts of vertebrates have different structures( i.e, they are 2,3, and 4- chambered) and they perform the same function of circulation so why they are not the examples of analogous organs??? PLEASE EXPLAIN IN DETAIL? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about There is a line in 12th ncert about homologous organs in pg:130 - '' Other examples are vertebrate heart or brains '' while we all know that hearts of vertebrates have different structures( i.e, they are 2,3, and 4- chambered) and they perform the same function of circulation so why they are not the examples of analogous organs??? PLEASE EXPLAIN IN DETAIL? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for There is a line in 12th ncert about homologous organs in pg:130 - '' Other examples are vertebrate heart or brains '' while we all know that hearts of vertebrates have different structures( i.e, they are 2,3, and 4- chambered) and they perform the same function of circulation so why they are not the examples of analogous organs??? PLEASE EXPLAIN IN DETAIL?.
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