Chordates up to classes

15 solved questions

Ask a question

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... Chordates up to classes 1 answer
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... Chordates up to classes 1 answer
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... Chordates up to classes 1 answer
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... Chordates up to classes 1 answer
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... Chordates up to classes 1 answer
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... Chordates up to classes 1 answer
Which one of the following organisms bears hollow and pneumatic long bones ? Answer: 1. Neophron Birds have light, hollow bones with air cavities (pneumatic bones) to help flight. Neophron (vulture) is a bird, so it h... Chordates up to classes 1 answer
Which of the following statements are true for the phylum-Chordata ?(a) In Urochordata notochord extends from head to tail and it is present throughout their life.(b) In Vertebrata notochord is present during the embryonic period only.(c) Central ner… Answer: 4. (b) and (c) Key idea: Check each statement. (a) False: in Urochordata the notochord is present only in the larval tail. (b) True... Chordates up to classes 1 answer
Match the following columns and select the correct option.Column - I: (a) 6 - 15 pairs of gill slits (b) Heterocercal caudal fin (c) Air Bladder (d) Poison stingColumn - II: (i) Trygon (ii) Cyclostomes (iii) Chondrichthyes (iv) Osteichthyes Answer: 1. (a) (ii), (b) (iii), (c) (iv), (d) (i) Key idea: Match each feature with its group. 6-15 pairs of gill slits: cyclostomes (ii) He... Chordates up to classes 1 answer
Identify the vertebrate group of animals characterized by crop and gizzard in its digestive system. Answer: 2. Aves Key idea: Birds (Aves) have a crop to store food and a gizzard to grind it. Their digestive tract is adapted to flight and a... Chordates up to classes 1 answer
Which one of these animals is not a homeotherm ? Answer: 3. Chelone Key idea: Homeotherms (warm-blooded) keep constant body temperature: birds and mammals. Macropus (kangaroo) and Camelus (... Chordates up to classes 1 answer
Which among these is the correct combination of aquatic mammals ? Answer: 2. Whales, Dolphins, Seals Aquatic mammals are mammals that live in water: whales, dolphins and seals. Trygon (sting ray) and sharks... Chordates up to classes 1 answer
Which of the following represents order of 'Horse' ? Answer: 1. Perissodactyla Key idea: The classification of the horse is: Kingdom Animalia, Phylum Chordata, Class Mammalia, Order Perissodact... Chordates up to classes 1 answer
Which of the following characteristic features always holds true for the corresponding group of animals ?(1) Cartilaginous endoskeleton | Chondrichthyes(2) Viviparous | Mammalia(3) Possess a mouth with an upper and a lower jaw | Chordata(4) 3 - chamb… Answer: 1. Cartilaginous endoskeleton - Chondrichthyes Class Chondrichthyes (sharks, rays) always has a cartilaginous endoskeleton. 2: Not a... Chordates up to classes 1 answer
Which one of the following characteristics is not shared by birds and mammals ? Answer: 3. Viviparity Both birds and mammals have a bony endoskeleton, breathe with lungs and are warm blooded. Viviparity (giving birth to... Chordates up to classes 1 answer