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NEET UG BIOLOGY MCQ: ANIMAL KINGDOM
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Analyzing
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Assertion (A): Sea walnuts are exclusively marine radially symmetrical, diploblastic organisms with tissue level of organisation.
Reason (R): It having efficient osmoregulatory organ which made them capable to survive in marine habitat.
Reason (R): It having efficient osmoregulatory organ which made them capable to survive in marine habitat.
View answer and explanation
Correct option: C
(A) is true but (R) is false
Option C ((A) is true but (R) is false) is correct because sea walnuts (Ctenophores) are marine, radially symmetrical, diploblastic organisms with tissue-level organization, but they do not have efficient osmoregulatory organs.
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a) In Vertebrata the notochord is replaced by a cartilaginous or bony vertebral column in the adult.
b) A post anal tail is present in all adult urochordates.
c) In Cephalochordata, notochord is present only in larval tail.
d) Vertebrates have a ventral muscular heart with two, three or four chambers. Read the following organisms given in the below
Tapeworm, Roundworm, Hookworm, Threadworm
How many of the above mentioned parasites causes inflammation of the intestinal tract? What is left when bath-sponges dries up?
