Diversity in Living World

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Role of the water vascular system in Echinoderms is :A. Respiration and LocomotionB. Excretion and LocomotionC. Capture and transport of foodD. Digestion and RespirationE. Digestion and ExcretionChoose the correct answer from the options given below… Answer: 2. A and C Only Key idea: The water vascular system of echinoderms (tube feet) works in locomotion, capture and transport of food, a... Non-chordates up to phyla 1 answer
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
While trying to find out the characteristic of a newly found animal, a researcher did the histology of adult animal and observed a cavity with presence of mesodermal tissue towards the body wall but no mesodermal tissue was observed towards the alime… Answer: 2. Pseudocoelomate Key idea: A pseudocoelom is a body cavity only partly lined by mesoderm. Here mesoderm is present towards the bod... Basis of animal classification 1 answer
The following are the statements about non-chordates :A. Pharynx is perforated by gill slits.B. Notochord is absent.C. Central nervous system is dorsal.D. Heart is dorsal if present.E. Post anal tail is absent.Choose the most appropriate answer from… Answer: 4. B, D & E only Key idea: compare chordate and non-chordate features. Non-chordates have no notochord (B), the heart, if present, i... Basis of animal classification 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
Consider the following statements :A. Annelids are true coelomatesB. Poriferans are pseudocoelomatesC. Aschelminthes are acoelomatesD. Platyhelminthes are pseudocoelomatesChoose the correct answer from the options given below : Answer: 3. A only Key idea: coelom type of each phylum. A: Annelids are true coelomates (metameric segmentation) - correct. B: Poriferans ar... Non-chordates up to phyla 1 answer
Match List I with List II :List I:A. PleurobrachiaB. RadulaC. StomochordD. Air bladderList II:I. MolluscaII. CtenophoraIII. OsteichthyesIV. HemichordataChoose the correct answer from the options given below : Answer: 3. A-II, B-I, C-IV, D-III Key idea: match each term with its phylum or class. Pleurobrachia (sea walnut) - Ctenophora (A-II). Radula... Non-chordates up to phyla 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
Radial symmetry is NOT found in adults of phylum ________. Answer: 3. Hemichordata Key idea: Adult hemichordates (such as Balanoglossus) are bilaterally symmetrical. Adult echinoderms, ctenophores an... Non-chordates up to phyla 1 answer
Match List I with List II.List I: A. Taenia; B. Paramoecium; C. Periplaneta; D. PheretimaList II: I. Nephridia; II. Contractile vacuole; III. Flame cells; IV. Urecose glandChoose the correct answer from the options give below: Answer: 4. A-III, B-II, C-IV, D-I Key idea: Match the animal with its excretory structure. Taenia: flame cells (III). Paramoecium: contracti... Non-chordates up to phyla 1 answer
In which of the following animals, digestive tract has additional chambers like crop and gizzard ? Answer: 1. Pavo, Psittacula, Corvus Key idea: Birds have a crop and a gizzard in the digestive tract. Pavo (peacock), Psittacula (parrot) an... Non-chordates up to phyla 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
Match the following :List - I / List - II(a) Physalia (i) Pearl oyster(b) Limulus (ii) Portuguese Man of War(c) Ancylostoma (iii) Living fossil(d) Pinctada (iv) HookwormChoose the correct answer from the options given below. Answer: 3. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i) Physalia - Portuguese Man of War (ii) Limulus (king crab) - living fossil (iii) Ancylostom... Non-chordates up to phyla 1 answer
Which one of the following belongs to the family Muscidae ? Answer: 4. House fly The house fly, Musca domestica, belongs to family Muscidae. Fire fly is a beetle (Lampyridae), grasshopper is Acrididae... Non-chordates up to phyla 1 answer
Read the following statements.(a) Metagenesis is observed in Helminths.(b) Echinoderms are triploblastic and coelomate animals.(c) Round worms have organ-system level of body organization.(d) Comb plates present in ctenophores help in digestion.(e) W… Answer: 4. (b), (c) and (e) are correct Check each statement. (a) Metagenesis (alternation of generations) is seen in cnidarians, not helmin... Non-chordates up to phyla 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
Match List - I with List - II.List - I / List - II(a) Metamerism (i) Coelenterata(b) Canal system (ii) Ctenophora(c) Comb plates (iii) Annelida(d) Cnidoblasts (iv) PoriferaChoose the correct answer from the options given below. Answer: 3. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i) Match each feature with its phylum. Metamerism (segmentation) - Annelida (iii) Canal syste... Non-chordates up to phyla 1 answer
Bilaterally symmetrical and acoelomate animals are exemplified by : Answer: 2. Platyhelminthes Platyhelminthes (flatworms) are bilaterally symmetrical and acoelomate. Ctenophora are radially symmetrical, Asch... Non-chordates up to phyla 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
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) Gregarious, polyphagous pest (b) Adult with radial symmetry and larva with bilateral symmetry (c) Book lungs (d) BioluminescenceColumn - II: (i) Asterias (ii) Scorpion (iii) Ct… Answer: 2. (a) (iv), (b) (i), (c) (ii), (d) (iii) Key idea: Match each feature with the animal. Gregarious polyphagous pest: Locusta (iv) Ad... Non-chordates up to phyla 1 answer
Match the following organisms with their respective characteristics :(a) Pila (i) Flame cells(b) Bombyx (ii) Comb plates(c) Pleurobrachia (iii) Radula(d) Taenia (iv) Malpighian tubulesSelect the correct option from the following : Answer: 2. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i) Key idea: Match each animal with its characteristic organ. Pila (mollusc): radula, (iii).... Non-chordates up to phyla 1 answer

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