Chordates up to classes
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See all →- All living members of the class Cyclostomata are: Answer: 4. Ectoparasite Key idea: Cyclostomes (lamprey, hagfish) are jawless vertebrates. All living members are ectoparasites on fishes. Th... 1
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A) : All vertebrates are chordates but all chordates are not vertebrate.Reason (R) : The members of subphylum vertebrata possess noto… Answer: 1. Both A and R are true and R is the correct explanation of A Key idea: All chordates have a notochord, but only vertebrates replac... 1
- Match List I with List II :List I:A. PterophyllumB. MyxineC. PristisD. ExocoetusList II:I. Hag fishII. Saw fishIII. Angel fishIV. Flying fishChoose the correct answer from the options given below : Answer: 3. A-III, B-I, C-II, D-IV Pterophyllum - angel fish (A-III). Myxine - hag fish (B-I). Pristis - saw fish (C-II). Exocoetus - flying... 1
- The unique mammalian characteristics are: Answer: 3. hairs, pinna and mammary glands Key idea: Hairs, external ear (pinna) and mammary glands are unique mammalian features. A monocon... 1
- Select the correct statements with reference to chordates.A. Presence of a mid-dorsal, solid and double nerve cord.B. Presence of closed circulatory system.C. Presence of paired pharyngeal gillslits.D. Presence of dorsal heartE. Triploblastic pseudoc… Answer: 3. B and C only Key idea: Recall the basic features of chordates. A is wrong: the nerve cord is dorsal, hollow and single. B is corr... 1
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A) :All vertebrates are chordates but all chordates are not vertebrates.Reason (R) :Notochord is replaced by vertebral column in the… Answer: 2. Both (A) and (R) are correct and (R) is the correct explanation of (A) Key idea: Chordates have a notochord. In vertebrates it is... 1