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NEET UG BIOLOGY MCQ: ANIMAL KINGDOM
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Study the following I) Chondrichthyes are mostly viviparous II) Fertilization is internal in cartilaginous fishes Correct ones of the above are
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Correct option: B
Only I and II
Option B (Only I and II) is correct because Chondrichthyes (cartilaginous fishes) are mostly viviparous or ovoviviparous, and fertilization is internal in this class.
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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?