Which one of the following statement is totally
wrong about the occurrence of notochord, while
the other three are correct?
(a) It is present only in larval tail in Ascidians.
(b) It is replaced by a vertebral column in adult
frog.
(c) It is absent throughout life in humans from
the very beginning.
(d) It is present throughout life in Amphioxus.
Answers
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0
Answer:
option a is wrong while 3 are true
Answered by
1
C. It is absent throughout life in humans from the very beginning.
Explanation:
The presence of notochord at any point of their life is a characteristic of vertebrates or chordates.
The notochord is present in all chordate embryo including humans.
Many vertebrates like amphibians (frog) have notochord as main axial support and for the correct development of dorsal aorta.
The notochord in human embryo will be future vertebral column in an adult.
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