The chitinous exoskeleton of arthropods is formed by the polymerization of:

Keratin sulphate and chondroitin sulphate

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Alpha Question Bank for Medical: Biology>Chapter 4 - Animal Kingdom>Exercise-5>Q 72

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Water from the two tanks shown in the diagram was tested 3 hours after they were stocked with indicated animals. The predominant nitrogenous waste detected in Tank-I and Tank-II respectively would be

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Important Questions on Animal Kingdom

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Alpha Question Bank for Medical: Biology>Chapter 4 - Animal Kingdom>Exercise-5>Q 73

Which of the following statement is correct?
I. In Urochordates like Ascidia, Salpa, Doliolum possess notochord only in their larva's tail.
II. In Cephalochordates like Branchiostoma (Amphioxus or Lancelet) notochord extends from anterior to posterior region of the body and persists throughout the life.
III. All vertebrates are chordates, but all chordates are not vertebrates.
IV. Notochord is replaced by vertebral column invertebrates.

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Alpha Question Bank for Medical: Biology>Chapter 4 - Animal Kingdom>Exercise-5>Q 74

I. Body is covered by dry and cornified skin, epidermal scales or scutes.
II. They have no external ear or pinna.
III. Crawling/creeping habit.
IV. Three chambered heart
The above characters are associated with;

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Alpha Question Bank for Medical: Biology>Chapter 4 - Animal Kingdom>Exercise-5>Q 75

Select the odd one out.

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Alpha Question Bank for Medical: Biology>Chapter 4 - Animal Kingdom>Exercise-5>Q 76

Petromyzon (Lamprey) and Myxine (Hagfish) are marine but migrate for spawning to freshwater, after that they die within few days. They belong to

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