SCIENCE
ZOOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following is not a defining trait of chordates?
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a notochord
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gill slits open across the wall of the pharynx
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muscular tail that extends beyond the anus
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a closed circulatory system
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Explanation:
Detailed explanation-1: -Thus, ‘Diploblastic’ is the right answer.
Detailed explanation-2: -Chordates also have a closed circulatory system, and most, but not all, chordates have a heart. The blood of most chordates contains the oxygen-carrying molecule hemoglobin. The muscles of the body are segmented into blocks called myotomes.
Detailed explanation-3: -Thus, ‘Solid tubular ventral nerve cord’ is not a characteristic of phylum Chordata.
Detailed explanation-4: -So, the correct option is ‘Diaphragm that separates thorax and abdomen’.
Detailed explanation-5: -Chordates have a closed circulatory system with a network of blood vessels throughout the body.
There is 1 question to complete.