31 Years NEET Previous Year Questions: Animal Kingdom - 2 - Free MCQ Test

A male shark possesses a pair of claspers which are inserted into a female shark’s cloaca (an opening on the underside of the body) at the time of mating. Claspers are located on the inner edge of the pelvic fins near the male’s cloaca. The function of claspers is to introduce sperm into a female shark’s body for the purpose of fertilizing her eggs. Female sharks do not have claspers.

In nature insects have the highest number of species (30 million). Fungi have 100,000, angiosperms have 260000 and birds have 10,000 species.

• Reptilia: Most have a 3-chambered heart, but some (like crocodiles) have a 4-chambered heart.
• Chordata: Not all chordates have a jaw; examples like some primitive fish lack jaws.
• Chondrichthyes: All members, including sharks and rays, have a cartilaginous skeleton, making this statement universally true.
• Mammalia: Not all mammals give live birth; for example, monotremes like the platypus lay eggs.

The correct option is B.

Ascaris belongs to Aschelminthes there is no segmentation of its body.

Pteropus is a flying fox. It is viviparous and mammals.

Aurelia is coelentra but only tissue level organisation is present. 

Salamander is an amphibian and it has tympanic membrane and external fertilization.

The notochord is a flexible rod-like structure that forms the main support of the body in the lowest chordates. In humans, the notochord is present during the embryonic stage and is replaced by the vertebral column in adults. Thus, the statement "It is absent throughout life in humans from the very beginning" is incorrect. The correct statement is that the notochord is present in the embryonic stage and later replaced by the vertebral column.

Human possesses enucleated RBC in mature state. But frog blood has both white and red blood cells which are nucleated. Frog cells do not lack platelets.

Animal (A) is an tapeworm (Phylum Platyhelminthes), (B) is a Aurelia (Phylum Cnidaria), (C) is an octopus (Phylum Mollusca), and (D) is a scorpion (Phylum Arthropoda). - (A) and (D) do not respire mainly through the body wall; Plateyhelmithes do, but scorpions breathe through book lungs. - (B) shows radial symmetry, but (C) shows bilateral symmetry; thus, (B) and (C) do not share radial symmetry. - (A) and (B) do not both have cnidoblasts; only (B) (Aurelia) has cnidoblasts. - (C) (octopus) and (D) (scorpion) both possess a true coelom, as they belong to coelomate groups Mollusca and Arthropoda respectively. Hence, option (d) is correct.

Correct option: A

• Pila is a gastropod mollusc. Molluscs have an unsegmented body and possess a radula. The character 'body segmented' is therefore incorrect for Pila, so this row is not correctly matched.

• Asterias (a starfish) shows spiny skin and a water vascular system, which are diagnostic characters of Echinodermata.

• Sycon is a calcareous sponge characterised by pores and a canal system, matching Porifera.

• Periplaneta (cockroach) has jointed appendages and a chitinous exoskeleton, characters of Arthropoda.

Therefore, option A is the only incorrectly matched row.

Option d: is correct-  Sea horse and Flying fish - Cold blooded (poikilothermal)

• Cold-blooded: Cold-blooded animals, also known as poikilothermic animals, can't regulate their body temperature based on the temperature of their surroundings. Their body temperature changes depending on their environment. 
• Sea horses: Seahorses are small marine bony fish with segmented bony armor, an upright posture, and a curled prehensile tail. 
• Flying fish: Flying fish are cold-blooded fish. 

Other pairs of animals

• Ascaris and Ancylostoma: These animals lack metameric segmentation because they are unsegmented. 
• Garden lizard and crocodile: All reptiles have three-chambered hearts, but garden lizards and crocodiles have four-chambered hearts. 
• Pteropus and Ornithorhyncus: Pteropus is viviparous, while Ornithorhynchus is oviparous. 

Prawn, Scoripion, Locusta belong to phylum-Arthropoda
Malarial parasite (Plasmodium vivax) and Amoeba belong to phylum-Protozoa.

Mosquito- Phylum- Arthropoda
Pinworm and
Tapeworm- Phylum-  Platyhelminthes

Sponge-phylum-Porifera, Sea abemone-phylum-Coelenterata
Starfish-phylum-Echinodermata

Ichthyophis – Amphibian
Limulus – Arthropoda
Adamsia – Cnidaria
Petromyzon – Jawless vertebrate & ectoparasite, cyclostomate

 House fly, butterfly, tse tse fly,  silverfish all belongs to insecta.

Silverfish belongs to Phylum Arthropoda.
Pufferfish and flying fish are fishes (Chordata), and cuttlefish is a mollusc.

Topic in NCERT: Phylum – Arthropoda

Line in NCERT: "Examples: Economically important insects Apis (Honey bee), Bombyx (Silkworm), Laccifer (Lac insect) Vectors (Mosquitoes) - Anopheles, Culex and Aedes Gregarious pest - Locusta (Locust) Living fossil - Limulus (King crab)."

Reptiles represent the first class of vertebrates fully adapted for life in dry places on land. The characters of reptiles are in fact a combination of characters that are found in fish and amphibians on one hand and birds and mammals on the other. Their exoskeleton is of horny epidermal scales, shields, plates and scutes. The skin is dry, cornifled and devoid of glands. Reptiles lack external ears and have immovable eyelids.