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NEET UG BIOLOGY MCQ: ANIMAL KINGDOM
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Which one of these organisms shows all the following properties?
I. Exclusively marine habitat
II. Migration to fresh water for spawning
III. After spawning, within a few days, it dies
I. Exclusively marine habitat
II. Migration to fresh water for spawning
III. After spawning, within a few days, it dies
View answer and explanation
Correct option: B
Petromyzon
Option B (Petromyzon) is correct because Petromyzon (lamprey) is exclusively marine, migrates to freshwater for spawning, and dies shortly after spawning (anadromous migration).
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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?