Q.Common name of some animals are given in Column A, write their scientific name in Column B.
Column A: a. Tiger b. Peacock c. Housefly
Column B: ________________ (for each)
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🔒 Start your 14-day free trial to unlock the full solution →Concept understanding — Animal Classification
Imagine walking into a vast library with more than a million books and no shelves, no catalogue, and no order at all. Finding anything, or even understanding what the collection contains, would be hopeless. The animal kingdom presents the same challenge: biologists have already described more than a million animal species. On that scale, a systematic way of grouping animals is not a mere convenience but a necessity.
Animal classification is the orderly grouping of animals so we can make sense of their enormous variety. It lets us do three things: make sense of the sheer diversity, study a few representative types instead of every single species, and give each newly discovered animal a definite, systematic position alongside its relatives. Crucially, the grouping is not arbitrary. Although animals differ enormously in outward shape and form, they share certain deep, fundamental features, and classification is built on these shared features rather than on superficial appearances.
The fundamental characters used as the basis of classification are:
- The level of organisation of the cells (cellular, tissue, organ, or organ-system).
- The body symmetry — whether, and in how many planes, the body divides into matching halves (asymmetry, radial, or bilateral).
- The number of germ layers in the embryo (diploblastic or triploblastic).
- The nature of the coelom, or body cavity — absent, false, or a true mesoderm-lined cavity (acoelomate, pseudocoelomate, or coelomate).
- The presence of segmentation of the body.
- The presence or absence of a notochord (chordate or non-chordate).
The patterns of the digestive, circulatory, and reproductive systems are compared as well. …
The scientific (binomial) names of the animals listed are as follows.
- Tiger — Panthera tigris
- Peacock — Pavo cristatus
- Housefly — Musca domestica
Each of these is written as a two-part Latin binomial name, consisting of a genus name followed by a species name, following the standard convention used to scientificall …
The scientific binomial names of the animals are Panthera tigris for the tiger, Pavo cristatus for the peacock, and Musca domestica for the housefly.
Every organism recognised in biology is given a formal two-part scientific name, called a binomial name, consisting of the genus it belongs to followed by its specific species name. These names are used internationally, regardless of the common or local name an animal might have in different languages, so that there is no ambiguity about which organism is being referred to. …
Method: Recalling binomial (scientific) names for commonly cited organisms
For "give the scientific name" questions, the reliable approach is to recall the binomial naming convention itself first — genus name (capitalised) followed by a species name (lowercase), always written in italics in print. This structure helps you sanity-check any name you recall: if what comes to mind isn't a two-word Genus-species pair, you likely have the common name or a partial fact instead. …
Showing the 12 most recent of 15 on this concept.
- AP EAPCET 2026Set ap-2026-05-19-FN1 markMCQQ.Study the following and pick up the correct combinations: S.No, Excretory organs, Group, Example: I. Coxal glands, Arachnida, Palamnaeus; II. Green glands, Chilopoda, Scolopendra; III. Malpighian tubules, Insecta, Musca; IV. Metanephridia, Mollusca, Limulus (A) I, II (B) I, III (C) I, IV (D) II, IV
›Reveal solutionSolution
Two of the four excretory-organ/group/example combinations are genuine (coxal glands–Arachnida–Palamnaeus, and Malpighian tubules–Insecta–Musca); the other two mismatch either the organ-to-group link or the example's actual taxon.
Concept and Intuition
Different invertebrate groups evolved distinct excretory structures: flame cells/protonephridia in flatworms, metanephridia in annelids (earthworm), coxal glands in many arachnids (scorpions, some spiders), green (antennal) glands in crustaceans, and Malpighian tubules in insects (and some arachnids). Getting the organ-group-example triad right requires knowing both the organ's typical group and the taxonomic placement of the named example animal.
Step-by-Step Solution
- I. Coxal glands – Arachnida – Palamnaeus: Palamnaeus is a scorpion genus, and scorpions (Arachnida) do excrete via coxal glands. Correct.
- II. Green glands – Chilopoda – Scolopendra: green (antennal) glands are the excretory organ of Crustacea, not centipedes; Scolopendra (a centipede, Chilopoda) actually excretes via Malpighian tubules. Incorrect pairing.
- III. Malpighian tubules – Insecta – Musca: Musca (housefly) is an insect, and insects excrete via Malpighian tubules. Correct. …
- AP EAPCET 2026Set ap-2026-05-20-FN1 markMCQQ.Study the following combinations S.No | Phylum | Unique character | Example I. Cnidaria | Coral formation | Gorgonia II. Ctenophora | Comb plates | Pleurobrachia III. Nematoda | Renette gland | Neometra IV. Mollusca | Radula | Pila Which of the above combinations are correct (A) I and II (B) I, II and IV (C) II, III and IV (D) III and IV
›Reveal solutionSolution
This tests whether you can spot a mismatched example even when the phylum and character named alongside it are both textbook-correct. The answer is (B): I, II and IV.
Concept and Intuition
Animal Kingdom classification questions often pair a valid phylum with a valid diagnostic character but attach the WRONG named example. You must verify each of the three columns (phylum, character, example) independently, not just check that the character sounds right for the phylum.
Step-by-Step Solution
- I. Cnidaria – Coral formation – Gorgonia: Gorgonia is a colonial anthozoan (a "sea fan") that secretes a horny/calcareous skeleton and contributes to coral-reef-like formations. Phylum, character and example all agree. ✓
- II. Ctenophora – Comb plates – Pleurobrachia: Ctenophores are radially symmetrical, biradial marine animals that swim using eight external rows of cilia fused into comb plates. Pleurobrachia is the standard NCERT example. ✓
- III. Nematoda – Renette gland – Neometra: Nematodes do excrete through a gland cell system, historically called the "renette gland" (or renette cell), so the character fits the phylum. But Neometra is not a nematode at all — it is a genus of feather star, an echinoderm (Crinoidea). The example is factually wrong, so this combination fails even though phylum+character look fine together. ✗ …
- AP EAPCET 2025Set ap-2025-05-19-AN1 markMCQQ.Match the following Animal - Class A) Feather star I) Bivalvia B) Acorn worm II) Asteroidea C) Pearl oyster III) Diplopoda D) Millipede IV) Enteropneusta V) Crinoidea (A) A-II, B-IV, C-III, D-I (B) A-V, B-III, C-I, D-II (C) A-V, B-IV, C-I, D-III (D) A-III, B-I, C-IV, D-V
›Reveal solutionSolution
Matching each animal to its correct class: Feather star–Crinoidea, Acorn worm–Enteropneusta, Pearl oyster–Bivalvia, Millipede–Diplopoda.
Concept and Intuition
This tests recall of representative classes across phyla: Echinodermata (Crinoidea = feather stars/sea lilies), Hemichordata (Enteropneusta = acorn worms), Mollusca (Bivalvia = two-shelled molluscs like oysters), and Arthropoda (Diplopoda = millipedes, two pairs of legs per segment).
Step-by-Step Solution
- Feather star is a stalked/free-living crinoid → class Crinoidea (V).
- Acorn worm is the classic hemichordate → class Enteropneusta (IV).
- Pearl oyster is a bivalve mollusc → class Bivalvia (I).
- Millipede has two pairs of legs per apparent segment → class Diplopoda (III). …
- AP EAPCET 2025Set ap-2025-05-19-FN1 markMCQQ.Match the following. Zoological name - Common name A) Pila - I. Water flea B) Lepisma - II. Spider C) Daphnia - III. Apple snail D) Aranea - IV. Scorpion
- V. Silver fish (A) A - III, B - V, C - I, D - II (B) A - II, B - I, C - V, D - III (C) A - III, B - V, C - II, D - IV (D) A - IV, B - II, C - I, D - V
›Reveal solutionSolution
This tests recall of common names for familiar invertebrate genera; the correct match is A-III, B-V, C-I, D-II.
Concept and Intuition
Each genus corresponds to a well-known common name used across zoology and pest-control contexts:
- Pila — a large freshwater gastropod, commonly called the apple snail.
- Lepisma — a wingless insect (Thysanura/Zygentoma) found in old books and damp places, commonly called silverfish.
- Daphnia — a small planktonic crustacean, commonly called the water flea.
- Aranea — a genus of spiders (Arachnida), commonly just called spider.
Step-by-Step Solution
- A) Pila → III (Apple snail)
- B) Lepisma → V (Silver fish)
- C) Daphnia → I (Water flea) …
- AP EAPCET 2025Set ap-2025-05-20-FN1 markMCQQ.Match the following. Larval form - Phylum A) Trochophore - I. Cnidaria B) Bipinnaria - II. Annelida C) Planula - III. Platyhelminthes D) Miracidium - IV. Echinodermata
- V. Nematoda (A) A-II, B-V, C-III, D-IV (B) A-IV, B-II, C-III, D-I (C) A-III, B-V, C-IV, D-II (D) A-II, B-IV, C-I, D-III
›Reveal solutionSolution
Each larval form is a classic diagnostic larva of its phylum: Trochophore–Annelida, Bipinnaria–Echinodermata, Planula–Cnidaria, Miracidium–Platyhelminthes.
Concept and Intuition
Many invertebrate phyla are identified in exams by their unique, distinctively named larval stages — a staple of comparative zoology:
- Trochophore: ciliated larva of Annelida (and Mollusca).
- Bipinnaria: free-swimming, bilaterally symmetric larva of Echinodermata (e.g., starfish), which later metamorphoses into the radially symmetric adult.
- Planula: ciliated, flattened larva of Cnidaria (e.g., jellyfish, corals), which settles to become a polyp.
- Miracidium: the first free-swimming larval stage of digenetic trematodes (Platyhelminthes), e.g., in the life cycle of Fasciola.
Step-by-Step Solution
- A) Trochophore → matches II (Annelida).
- B) Bipinnaria → matches IV (Echinodermata).
- C) Planula → matches I (Cnidaria).
- D) Miracidium → matches III (Platyhelminthes). …
- AP EAPCET 2024Set ap-2024-05-16-AN1 markMCQQ.Statement I: Flame cells in flat worms help in osmoregulation and excretion. Statement II: In chilopods maxillae are modified into gnathochilarium (A) Both the statements I and II are correct (B) Both statements I and II are false (C) Statement I is correct. But II is false (D) Statement I is false. But II is correct
›Reveal solutionSolution
Flame-cell function is correctly stated (true); the gnathochilarium belongs to Diplopoda, not Chilopoda, so Statement II is false.
Concept and Intuition
Flatworms (Platyhelminthes) lack a circulatory system, so their protonephridial flame cells (bulb-shaped cells with a tuft of beating cilia — the 'flame') both drive fluid movement through the tubule system and help regulate water balance, doubling as an excretory/osmoregulatory unit. In myriapods, the two classes differ in mouthpart fusion: in Diplopoda (millipedes) the second maxillae fuse into a single plate-like gnathochilarium; in Chilopoda (centipedes) the maxillae remain more separate and the first trunk appendages are modified into poison claws (forcipules) instead.
Step-by-Step Solution
- Statement I: flame cells → osmoregulation + excretion in flatworms — matches known physiology, TRUE.
- Statement II: claims gnathochilarium is a Chilopod feature — but gnathochilarium is diagnostic of Diplopoda, not Chilopoda, so FALSE. …
- AP EAPCET 2024Set ap-2024-05-16-FN1 markMCQQ.Statement I: Crystalline style present in stomach of pelecypods help in digestion of starches. Statement II: Larva of sea cucumbers is auricularia (A) Both the statements I and II are correct (B) Both statements I and II are false (C) Statement I is true. But II is false (D) Statement I is false. But II is true
›Reveal solutionSolution
Both facts are textbook-correct: bivalves' crystalline style aids starch digestion, and sea cucumbers' larva is the auricularia.
Concept and Intuition
- Statement I: In many bivalves (Pelecypoda/Bivalvia, e.g. mussels, clams), the stomach contains a rotating, mucus-bound rod called the crystalline style, which releases digestive enzymes (notably amylase) as it slowly dissolves, helping digest starch/carbohydrate particles filtered from the water. This is correct.
- Statement II: Echinoderms have characteristic free-swimming larval forms named for each class; for the class Holothuroidea (sea cucumbers), the larva is called auricularia. This is correct.
Step-by-Step Solution
- Verify Statement I against known bivalve digestive physiology — crystalline style does aid starch digestion via amylase. True. …
- AP EAPCET 2024Set ap-2024-05-16-FN1 markMCQQ.Study the following and pick up the correct combinations: S.No / Class / Features / Examples I / Polychaeta / Parapodia / Pheretima II / Hirudinea / Botryoidal tissue / Pontobdella III / Anthozoa / Polypoid forms / Adamsia IV / Ctenophora / Cnidocytes / Pleurobrachia (A) I, II (B) III, IV (C) I, IV (D) II, III
›Reveal solutionSolution
Checking each class-feature-example combination: Polychaeta/Pheretima is wrong (Pheretima is Oligochaeta), Ctenophora/Cnidocytes is wrong (ctenophores have colloblasts, not cnidocytes); only Hirudinea/Pontobdella and Anthozoa/Adamsia are correctly paired.
Concept and Intuition
This question tests precise class-level examples across two phyla (Annelida and Cnidaria/Ctenophora):
- Polychaeta are characterised by paired lateral appendages called parapodia used in locomotion (e.g. Nereis), but Pheretima (the common earthworm) belongs to Oligochaeta, not Polychaeta — so this pairing is wrong.
- Hirudinea (leeches) lack a true coelom and instead have botryoidal tissue filling the body spaces; Pontobdella is a genuine marine leech genus — this pairing is correct.
- Anthozoa (sea anemones, corals) exist only in the polypoid form (no medusa stage); Adamsia is the sea anemone famously associated with hermit crabs — this pairing is correct.
- Cnidocytes (stinging cells) are a defining feature of Cnidaria, not Ctenophora; ctenophores (like Pleurobrachia) instead possess adhesive colloblasts for prey capture — so this pairing is wrong.
Step-by-Step Solution
- I: Polychaeta/Parapodia/Pheretima — Pheretima is Oligochaeta, not Polychaeta → incorrect. …
- AP EAPCET 2024Set ap-2024-05-17-AN1 markMCQQ.Match the following. Class : Larval form — A. Porifera : I. Planula; B. Cnidaria : II. Trochophore; C. Annelida : III. Auricularia; D. Echinodermata : IV. Parenchymula (A) A–III, B–IV, C–I, D–II (B) A–III, B–I, C–IV, D–II (C) A–IV, B–I, C–III, D–II (D) A–IV, B–I, C–II, D–III
›Reveal solutionSolution
Each invertebrate phylum has a characteristic ciliated larval form: sponges (parenchymula), cnidarians (planula), annelids (trochophore), and echinoderms (auricularia, among others).
Concept and Intuition
Many marine invertebrates have a free-swimming, ciliated larval stage before metamorphosing into the adult body plan. These larval forms are named distinctly for each phylum and are a classic way developmental biology links different animal groups.
Step-by-Step Solution
- Porifera (A): the free-swimming larva is the parenchymula (a solid, ciliated larva) → IV.
- Cnidaria (B): the ciliated, free-swimming larva is the planula → I.
- Annelida (C): the characteristic larva is the trochophore (a top-shaped, ciliated larva, also seen in molluscs) → II. …
- AP EAPCET 2024Set ap-2024-05-17-FN1 markMCQQ.Choose the correct combination among the following.
Class Animal Special character I Cephalopoda Loligo Torsion in development II Tentaculata Pleurobrachia Comb plates III Hirudinea Haemodipsa Botryoidal tissue IV Pelecypoda Pulsellum Crystalline style (A) I, II (B) II, IV (C) I, IV (D) II, III ›Reveal solutionSolution
Pleurobrachia/comb plates and Haemadipsa/botryoidal tissue are correctly matched; Loligo does not undergo torsion, and Pulsellum belongs to Scaphopoda, not Pelecypoda. Answer: (D).
Concept and Intuition
Each row pairs a taxonomic class with a genus example and a special anatomical character:
- Torsion (a 180° twisting of the visceral mass during development) is a defining feature of Gastropoda, not Cephalopoda — so Loligo (a cephalopod/squid) does not show torsion.
- Tentaculata (a class of Ctenophora with tentacles, e.g., Pleurobrachia) share the phylum-wide feature of comb plates (ctenes) used for locomotion.
- Hirudinea (leeches, e.g., Haemadipsa) possess botryoidal tissue, a specialised tissue that largely replaces the coelom.
- Pulsellum is actually a genus belonging to class Scaphopoda (tusk shells), not Pelecypoda (bivalves) — although 'crystalline style' genuinely is a bivalve digestive structure, it is wrongly attached here to the wrong genus/class.
Step-by-Step Solution
- Check I: Cephalopoda – Loligo – Torsion. Torsion is a gastropod feature, not seen in cephalopods. Incorrect.
- Check II: Tentaculata – Pleurobrachia – Comb plates. Matches ctenophore anatomy correctly. Correct. …
- AP EAPCET 2023Set ap-2023-05-23-FN1 markMCQQ.Match the following List I: A. Gorgonia B. Pontobdella C. Balanus D. Echinus List II: i. Marine leech ii. Sea Urchin iii. Sea Fan iv. Rock barnacle (A) A – iii B – i C – iv D – ii (B) A – iii B – iv C – ii D – i (C) A – iv B – i C – ii D – iii (D) A – ii B – iv C – i D – iii
›Reveal solutionSolution
This tests recall of standard example organisms for each invertebrate group taught in NCERT/State-board zoology. Gorgonia = sea fan, Pontobdella = marine leech, Balanus = rock barnacle, Echinus = sea urchin, giving match A–iii, B–i, C–iv, D–ii.
Concept and Intuition
Board-level invertebrate zoology leans heavily on a short list of "type" genera that each represent a phylum or class. Recognising them by name is really recognising the body plan they stand for:
- A colonial cnidarian with a flattened, branching, fan-like colony (soft coral relative) is always Gorgonia, the sea fan.
- A blood-feeding annelid worm with suckers, found on fish or other hosts, is a leech — Pontobdella is the marine (fish) leech, as opposed to freshwater Hirudinaria.
- A sessile, calcareous-shelled crustacean cemented to rocks/ship hulls is a barnacle — Balanus is the rock/acorn barnacle.
- A globular, spine-covered echinoderm is a sea urchin — Echinus is the type genus.
Step-by-Step Solution
- Identify each genus's phylum/class from memory: Gorgonia → Cnidaria (Anthozoa); Pontobdella → Annelida (Hirudinea); Balanus → Arthropoda (Cirripedia); Echinus → Echinodermata (Echinoidea).
- Match each to its common name in List II: Cnidarian colony with fan shape → "Sea Fan" (iii); blood-sucking annelid on fish → "Marine leech" (i); rock-cemented crustacean → "Rock barnacle" (iv); spiny globular echinoderm → "Sea Urchin" (ii).
- Assemble: A–iii, B–i, C–iv, D–ii. …
- AP EAPCET 2022Set ap-2022-07-11-AN1 markMCQQ.Which one of the following is wrongly matched? (A) Adamsia – Sea anemone (B) Pennatula – Sea pen (C) Gorgonia – Sea fan (D) Ascaris – Hookworm
›Reveal solutionSolution
Ascaris is the roundworm, not the hookworm, making "Ascaris – Hookworm" the incorrect match among the given options.
Concept and Intuition
This question tests matching common/vernacular names to animal genera, a standard zoology recall exercise. Adamsia is commonly called the sea anemone (often seen in commensal association with hermit crabs); Pennatula is the sea pen (a colonial cnidarian resembling an old quill pen); Gorgonia is the sea fan (a colonial coral resembling a fan). Ascaris, by contrast, is the common roundworm (causing ascariasis in humans), which is entirely distinct from hookworms, whose genera are Ancylostoma and Necator.
Step-by-Step Solution
- Check (A): Adamsia is indeed commonly called the sea anemone — correctly matched.
- Check (B): Pennatula is indeed the sea pen — correctly matched.
- Check (C): Gorgonia is indeed the sea fan — correctly matched. …
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