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NEET UG BIOLOGY MCQ: ANIMAL KINGDOM
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Hard
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Understanding
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Assertion (A) : In larva of Doliolum, nerve cord is ventral to gut.
Reason (R) : Nerve cord in it is single and hollow.
Reason (R) : Nerve cord in it is single and hollow.
View answer and explanation
Correct option: B
(A) is false but (R) is true
Option B ((A) is false but (R) is true) is correct because in larva of Doliolum, nerve cord is dorsal to gut, and nerve cord in it is single and hollow.
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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?