NCERT NEET Biology English Medium Part-1 | Chapter 4 : Animal Kingdom

NCERT NEET Biology English Medium Part-1 | Chapter 4 : Animal Kingdom.

---

Question 1: In which of the following animals does the cellular level of organization occur?

1. Sponges.
2. Cnidarians.
3. Ctenophores.
4. Platyhelminthes.

Answer: a.

Question 2: Which type of symmetry is mostly found in members of the phylum Porifera?

1. Radial symmetry.
2. Bilateral symmetry.
3. Asymmetry.
4. Spherical symmetry.

Answer: c.

Question 3: When any plane passing through the central axis of the body divides the organism into two identical halves, it is called:

1. Asymmetry.
2. Radial symmetry.
3. Bilateral symmetry.
4. Biradial symmetry.

Answer: b.

Question 4: Animals in which the cells are arranged in two embryonic layers, an external ectoderm and an internal endoderm, are called:

1. Triploblastic animals.
2. Diploblastic animals.
3. Coelomate animals.
4. Pseudocoelomate animals.

Answer: b.

Question 5: An undifferentiated layer, mesoglea, is present in between the ectoderm and the endoderm in:

1. Platyhelminthes.
2. Aschelminthes.
3. Coelenterates.
4. Annelids.

Answer: c.

Question 6: The body cavity which is lined by mesoderm is called:

1. Pseudocoelom.
2. Haemocoel.
3. Coelom.
4. Spongocoel.

Answer: c.

Question 7: In which of the following phyla is the body cavity not lined by mesoderm, instead, the mesoderm is present as scattered pouches?

1. Platyhelminthes.
2. Aschelminthes.
3. Annelida.
4. Arthropoda.

Answer: b.

Question 8: Metamerism is a characteristic feature of which of the following phyla?

1. Mollusca.
2. Porifera.
3. Annelida.
4. Echinodermata.

Answer: c.

Question 9: Notochord is a mesodermally derived rod-like structure formed on the:

1. Ventral side during embryonic development.
2. Dorsal side during embryonic development.
3. Lateral side during adult stage.
4. Dorsal side during adult stage.

Answer: b.

Question 10: Which of the following is considered a pseudocoelomate?

1. Ascaris.
2. Fasciola.
3. Sycon.
4. Pheretima.

Answer: a.

Question 11: The water transport or canal system is a characteristic feature of:

1. Cnidarians.
2. Ctenophores.
3. Sponges.
4. Echinoderms.

Answer: c.

Question 12: In sponges, water enters through minute pores called ostia into a central cavity known as:

1. Gastrovascular cavity.
2. Spongocoel.
3. Pseudocoelom.
4. Archenteron.

Answer: b.

Question 13: Which cells line the spongocoel and the canals in poriferans?

1. Amoebocytes.
2. Choanocytes.
3. Pinacocytes.
4. Porocytes.

Answer: b.

Question 14: The skeleton of sponges is made up of:

1. Spicules or spongin fibers.
2. Chitinous exoskeleton.
3. Calcareous shell.
4. Cartilage.

Answer: a.

Question 15: Which of the following is a freshwater sponge?

1. Sycon.
2. Euspongia.
3. Spongilla.
4. Physalia.

Answer: c.

Question 16: The name Cnidaria is derived from the presence of:

1. Choanocytes.
2. Cnidoblasts or cnidocytes.
3. Colloblasts.
4. Comb plates.

Answer: b.

Question 17: Which of the following forms of cnidarians is sessile and cylindrical?

1. Medusa.
2. Polyp.
3. Planula.
4. Ephyra.

Answer: b.

Question 18: Metagenesis or alternation of generation is exhibited by:

1. Hydra.
2. Adamsia.
3. Obelia.
4. Spongilla.

Answer: c.

Question 19: Which of the following is commonly known as the Portuguese man-of-war?

1. Pennatula.
2. Gorgonia.
3. Meandrina.
4. Physalia.

Answer: d.

Question 20: Ctenophores are commonly known as:

1. Sea anemones.
2. Sea walnuts or comb jellies.
3. Sea pens.
4. Sea fans.

Answer: b.

Question 21: Locomotion in ctenophores is facilitated by:

1. Tentacles.
2. Eight external rows of ciliated comb plates.
3. Parapodia.
4. Water vascular system.

Answer: b.

Question 22: Bioluminescence, the property of a living organism to emit light, is well-marked in:

1. Poriferans.
2. Ctenophores.
3. Platyhelminthes.
4. Aschelminthes.

Answer: b.

Question 23: Which of the following organisms represents a ctenophore?

1. Pleurobrachia.
2. Fasciola.
3. Taenia.
4. Ascaris.

Answer: a.

Question 24: Members of Platyhelminthes are commonly called flatworms because they have a:

1. Laterally compressed body.
2. Dorso-ventrally flattened body.
3. Cylindrical body.
4. Radially symmetrical body.

Answer: b.

Question 25: Specialized cells in flatworms that help in osmoregulation and excretion are:

1. Nephridia.
2. Malpighian tubules.
3. Flame cells.
4. Proboscis gland.

Answer: c.

Question 26: Hooks and suckers are present in the parasitic forms of which phylum?

1. Aschelminthes.
2. Annelida.
3. Platyhelminthes.
4. Arthropoda.

Answer: c.

Question 27: Which of the following flatworms possesses a high regeneration capacity?

1. Taenia.
2. Fasciola.
3. Planaria.
4. Wuchereria.

Answer: c.

Question 28: The body of Aschelminthes is circular in cross-section, hence they are known as:

1. Flatworms.
2. Roundworms.
3. Earthworms.
4. Tapeworms.

Answer: b.

Question 29: In roundworms, the alimentary canal is complete with a well-developed:

1. Muscular pharynx.
2. Gizzard.
3. Crop.
4. Radula.

Answer: a.

Question 30: Which of the following shows sexual dimorphism where females are often longer than males?

1. Pheretima.
2. Ascaris.
3. Hirudinaria.
4. Fasciola.

Answer: b.

Question 31: Ancylostoma is commonly known as:

1. Filaria worm.
2. Hookworm.
3. Roundworm.
4. Flatworm.

Answer: b.

Question 32: Longitudinal and circular muscles which help in locomotion are found in:

1. Aschelminthes.
2. Annelida.
3. Arthropoda.
4. Mollusca.

Answer: b.

Question 33: Aquatic annelids like Nereis possess lateral appendages which help in swimming called:

1. Setae.
2. Suckers.
3. Parapodia.
4. Tentacles.

Answer: c.

Question 34: In annelids, osmoregulation and excretion are carried out by:

1. Flame cells.
2. Nephridia.
3. Malpighian tubules.
4. Green glands.

Answer: b.

Question 35: Which of the following is a dioecious annelid?

1. Earthworm.
2. Leech.
3. Nereis.
4. Hirudinaria.

Answer: c.

Question 36: The largest phylum of Animalia which includes insects is:

1. Mollusca.
2. Arthropoda.
3. Annelida.
4. Chordata.

Answer: b.

Question 37: The body of arthropods is covered by an exoskeleton made of:

1. Spongin.
2. Chitin.
3. Calcium carbonate.
4. Silica.

Answer: b.

Question 38: In arthropods, the body is generally divided into:

1. Head, thorax, and abdomen.
2. Head, muscular foot, and visceral hump.
3. Proboscis, collar, and trunk.
4. Cephalothorax and abdomen.

Answer: a.

Question 39: Respiratory organs in arthropods do NOT include:

1. Gills.
2. Book gills.
3. Book lungs.
4. Radula.

Answer: d.

Question 40: Excretion in typical insects takes place through:

1. Nephridia.
2. Malpighian tubules.
3. Flame cells.
4. Proboscis gland.

Answer: b.

Question 41: Which of the following is a gregarious pest?

1. Bombyx.
2. Laccifer.
3. Locusta.
4. Limulus.

Answer: c.

Question 42: Limulus is commonly known as:

1. King crab.
2. Filaria worm.
3. Apple snail.
4. Pearl oyster.

Answer: a.

Question 43: The second largest animal phylum is:

1. Arthropoda.
2. Mollusca.
3. Annelida.
4. Chordata.

Answer: b.

Question 44: The body of a mollusc is unsegmented with a distinct:

1. Head, thorax, and abdomen.
2. Head, muscular foot, and visceral hump.
3. Proboscis, collar, and trunk.
4. Calyx, stalk, and tentacles.

Answer: b.

Question 45: The soft and spongy layer of skin forming a mantle over the visceral hump is a characteristic of:

1. Arthropoda.
2. Echinodermata.
3. Mollusca.
4. Hemichordata.

Answer: c.

Question 46: In molluscs, the file-like rasping organ for feeding is called:

1. Radula.
2. Mantle.
3. Ctenidia.
4. Proboscis.

Answer: a.

Question 47: Which of the following belongs to the phylum Mollusca?

1. Pinctada.
2. Asterias.
3. Echinus.
4. Antedon.

Answer: a.

Question 48: The endoskeleton of echinoderms is composed of:

1. Chitin.
2. Calcareous ossicles.
3. Spongin fibers.
4. Cartilage.

Answer: b.

Question 49: Adult echinoderms are radially symmetrical but larvae are:

1. Asymmetrical.
2. Radially symmetrical.
3. Bilaterally symmetrical.
4. Spherically symmetrical.

Answer: c.

Question 50: The most distinctive feature of echinoderms is the presence of:

1. Water canal system.
2. Water vascular system.
3. Haemal system.
4. Tracheal system.

Answer: b.

Question 51: The excretory system is absent in members of phylum:

1. Arthropoda.
2. Mollusca.
3. Echinodermata.
4. Annelida.

Answer: c.

Question 52: Ophiura belongs to the phylum:

1. Hemichordata.
2. Echinodermata.
3. Mollusca.
4. Arthropoda.

Answer: b.

Question 53: Hemichordata was earlier considered as a sub-phylum under phylum Chordata, but now it is placed as a separate phylum under:

1. Protochordata.
2. Non-chordata.
3. Vertebrata.
4. Urochordata.

Answer: b.

Question 54: The body of hemichordates is cylindrical and composed of an anterior proboscis, a collar, and a long:

1. Tail.
2. Trunk.
3. Abdomen.
4. Foot.

Answer: b.

Question 55: Excretory organ in Hemichordata is the:

1. Radula.
2. Nephridia.
3. Proboscis gland.
4. Malpighian tubule.

Answer: c.

Question 56: Balanoglossus and Saccoglossus are examples of:

1. Urochordates.
2. Cephalochordates.
3. Hemichordates.
4. Cyclostomes.

Answer: c.

Question 57: The fundamental character of chordates does NOT include:

1. Presence of notochord.
2. Dorsal hollow nerve cord.
3. Paired pharyngeal gill slits.
4. Ventral solid nerve cord.

Answer: d.

Question 58: In Urochordata, the notochord is present:

1. Only in the larval tail.
2. Throughout life.
3. Only in the adult stage.
4. Extended from head to tail region.

Answer: a.

Question 59: Which of the following is a cephalochordate?

1. Ascidia.
2. Salpa.
3. Branchiostoma.
4. Doliolum.

Answer: c.

Question 60: In Vertebrata, the notochord is replaced by a cartilaginous or bony vertebral column in the:

1. Embryonic stage.
2. Larval stage.
3. Adult stage.
4. Post-reproductive stage.

Answer: c.

Question 61: Agnatha is a division of Vertebrata that lacks:

1. Jaws.
2. Notochord.
3. Fins.
4. Heart.

Answer: a.

Question 62: All living members of the class Cyclostomata are ectoparasites on some:

1. Reptiles.
2. Mammals.
3. Fishes.
4. Amphibians.

Answer: c.

Question 63: Cyclostomes have an elongated body bearing how many pairs of gill slits for respiration?

1. 2-5 pairs.
2. 4-6 pairs.
3. 6-15 pairs.
4. 15-20 pairs.

Answer: c.

Question 64: Which of the following is a characteristic of cyclostomes?

1. Closed circular mouth without jaws.
2. Paired fins.
3. Scales on the body.
4. Bony endoskeleton.

Answer: a.

Question 65: Petromyzon (Lamprey) spawns in freshwater but its larvae return to the ocean after:

1. Metagenesis.
2. Metamorphosis.
3. Paedogenesis.
4. Parthenogenesis.

Answer: b.

Question 66: Class Chondrichthyes contains marine animals with an endoskeleton made of:

1. Bone.
2. Cartilage.
3. Chitin.
4. Spongin.

Answer: b.

Question 67: In Chondrichthyes, the mouth is located:

1. Terminally.
2. Dorsally.
3. Ventrally.
4. Laterally.

Answer: c.

Question 68: The gill slits in Chondrichthyes are separate and without an operculum except in:

1. Scoliodon.
2. Pristis.
3. Carcharodon.
4. Chimaera (though strictly they lack it usually, standard NCERT says without operculum generally for the class).

Answer: d. Correction for standard NCERT MCQ formulation below:

Question 68: The gill slits in class Chondrichthyes are separate and lack a gill cover called:

1. Mantle.
2. Operculum.
3. Carapace.
4. Plastron.

Answer: b.

Question 69: Due to the absence of an air bladder, which fishes have to swim constantly to avoid sinking?

1. Osteichthyes.
2. Chondrichthyes.
3. Cyclostomata.
4. Both b and c.

Answer: b.

Question 70: In Chondrichthyes, the heart is two-chambered with:

1. One auricle and one ventricle.
2. Two auricles.
3. Two ventricles.
4. One auricle and two ventricles.

Answer: a.

Question 71: Torpedo is a cartilaginous fish known for having:

1. Poison sting.
2. Electric organs.
3. Bioluminescence.
4. Placoid scales only.

Answer: b.

Question 72: Male pelvic fins bear claspers in which of the following groups?

1. Osteichthyes.
2. Chondrichthyes.
3. Amphibia.
4. Cyclostomata.

Answer: b.

Question 73: The skin of cartilaginous fishes is tough and contains minute:

1. Cycloid scales.
2. Ctenoid scales.
3. Placoid scales.
4. Ganoid scales.

Answer: c.

Question 74: Members of Osteichthyes have a bony endoskeleton and a mouth that is mostly:

1. Ventral.
2. Terminal.
3. Dorsal.
4. Lateral.

Answer: b.

Question 75: The body of bony fishes is covered with:

1. Placoid scales.
2. Cycloid/ctenoid scales.
3. Epidermal scales.
4. Scutes.

Answer: b.

Question 76: Air bladder is present and regulates buoyancy in:

1. Scoliodon.
2. Pristis.
3. Labeo.
4. Trygon.

Answer: c.

Question 77: Which of the following is an aquarium bony fish?

1. Exocoetus.
2. Hippocampus.
3. Pterophyllum.
4. Clarias.

Answer: c.

Question 78: The class name Amphibia indicates that these animals can live in aquatic as well as:

1. Arboreal habitats.
2. Aerial habitats.
3. Terrestrial habitats.
4. Subterranean habitats.

Answer: c.

Question 79: In amphibians, the alimentary canal, urinary and reproductive tracts open into a common chamber called:

1. Rectum.
2. Cloaca.
3. Anus.
4. Ostium.

Answer: b.

Question 80: Respiration in amphibians can occur through:

1. Gills only.
2. Lungs only.
3. Skin only.
4. Gills, lungs, and skin.

Answer: d.

Question 81: The heart of an amphibian is:

1. Two-chambered.
2. Three-chambered.
3. Four-chambered.
4. Single-chambered.

Answer: b.

Question 82: Which of the following is a limbless amphibian?

1. Bufo.
2. Rana.
3. Hyla.
4. Ichthyophis.

Answer: d.

Question 83: The class name Reptilia refers to their:

1. Flying mode of locomotion.
2. Creeping or crawling mode of locomotion.
3. Aquatic mode of life.
4. Arboreal adaptation.

Answer: b.

Question 84: The body of reptiles is covered by dry and cornified skin containing epidermal scales or:

1. Feathers.
2. Hair.
3. Scutes.
4. Fur.

Answer: c.

Question 85: Tympanum represents the ear in:

1. Fishes and Amphibians.
2. Amphibians and Reptiles.
3. Reptiles and Mammals.
4. Aves and Mammals.

Answer: b.

Question 86: The heart in reptiles is usually three-chambered, but it is four-chambered in:

1. Snakes.
2. Lizards.
3. Crocodiles.
4. Turtles.

Answer: c.

Question 87: Snakes and lizards shed their scales as:

1. Moults.
2. Skin cast.
3. Exuviae.
4. Slime.

Answer: b.

Question 88: Which of the following is a poisonous snake?

1. Naja.
2. Python.
3. Testudo.
4. Chelone.

Answer: a.

Question 89: The characteristic feature of Aves is the presence of:

1. Hair.
2. Scales on the entire body.
3. Feathers.
4. Mammary glands.

Answer: c.

Question 90: In birds, the forelimbs are modified into:

1. Hindlimbs.
2. Wings.
3. Flippers.
4. Tentacles.

Answer: b.

Question 91: The hind limbs of birds generally have scales and are modified for:

1. Walking, swimming or clasping.
2. Flying and gliding.
3. Catching prey only.
4. Digging burrows.

Answer: a.

Question 92: The endoskeleton in birds is fully ossified, and the long bones are hollow with air cavities. This condition is called:

1. Cartilaginous bones.
2. Spongy bones.
3. Pneumatic bones.
4. Calcified bones.

Answer: c.

Question 93: The digestive tract of birds has additional chambers, which are the:

1. Rumen and reticulum.
2. Crop and gizzard.
3. Omasum and abomasum.
4. Pharynx and larynx.

Answer: b.

Question 94: Birds are warm-blooded or homoiothermous, meaning they:

1. Change their body temperature with the environment.
2. Hibernate during winter.
3. Are able to maintain a constant body temperature.
4. Have mixed oxygenated and deoxygenated blood.

Answer: c.

Question 95: Air sacs in birds supplement respiration by:

1. Storing food.
2. Increasing surface area for digestion.
3. Connecting to the lungs.
4. Filtering air.

Answer: c.

Question 96: Neophron is commonly known as:

1. Ostrich.
2. Vulture.
3. Penguin.
4. Parrot.

Answer: b.

Question 97: The most unique mammalian characteristic is the presence of:

1. Four-chambered heart.
2. Milk-producing glands.
3. Lungs for respiration.
4. Bilateral symmetry.

Answer: b.

Question 98: In mammals, the skin is unique in possessing:

1. Scales.
2. Hair.
3. Feathers.
4. Scutes.

Answer: b.

Question 99: Mammals are heterodont, which means they have:

1. Teeth of the same type.
2. Different types of teeth present in the jaw.
3. No teeth at all.
4. Teeth that grow continuously.

Answer: b.

Question 100: Which of the following is an oviparous mammal?

1. Macropus.
2. Pteropus.
3. Ornithorhynchus.
4. Delphinus.

Answer: c.

---