Test: Animal Kingdom 4 - From Past 28 Years Questions - NEET MCQ

Vertebrates are also known as  Craniata due to presence of skull in all its members.

Jurassic period of mesozoic era is known as the ‘Age of reptiles’.

The organisms, which are attached to substratum, generally, possess radial symmetry in all vertical planes.

Metamerism is an important character of annelida and arthropoda. The body is divided externally into segments called metameres. Metamerism is also exhibited by chordata due to repetition of a succession of homologous structures alongth anterio-posterior axis.

Birds have pneumatic bones.

Coelom is a fluid filled space between body wall and alimentary canal which is lined by parietal peritoneum (mesoderm) on the outer side and visceral peritoneum ( mesoderm) on the inner side.

Sponges are marine with the exception of family spongilidae, the members of which occur in fresh water e.g. Spongilla. Their endoskeleton is made of either spicules or spongin fibres or both. Sponges reproduce asexually by fragmentation or by budding or through gemmules and reduction bodies. Sponges also exhibit sexual reproduction.

Toads possess a  pair of large parotid glands behind the tympana. They produce a milky poisonous fluid. Statocysts are the organs of equilibrium and sensory perception located at the base of antennae. Flame cells in liver fluke are the excretory organs.

Flightless birds are restricted to the islands of Australia and New Guinea.

Silver fish (Insecta), scorpion (Arachnida); crab (Crustacea) and honey bee (Insecta) all belong to phylum Arthropoda which is characterized by the presence of jointed appendages. Poison gland occur only in scorpion. Compound eyes  and metamorphosis are the characteristic of  insects.

Hollow bones are characteristic adaptive features of  birds. It reduces their body weight and is a major flight adaptation.

Metamorphosis is the gradual transformation of the embryo to the adult through a larval and pupal stage. Alternation of generation is seen in the plant kingdom wherein a haploid gametophyte generation alternates with diploid sporophyte generation. Phenomenon of  sexual reproduction by a larva is known as neoteny e.g. Axolotl larva. In Obelia polyps reproduce medusaes asexually and medusae form the polyps sexually. Such alternation of asexual and sexual phases in the life cycle of Obelia is called metagenesis.

Fussorial are the animals which live beneath the soil (in low temperature) and are found abundant in desert grasslands.

Sponges show cell aggregate body organization. Cell tissue organization appears in coelenterates.   Platyhelminthes show tissue organ organizations.

Duck-billed platypus is an egg laying mammal.

Sexual dimorphism is common between Ascaris lumbricoides and Anopheles stephensi. Male and female round worms can be morphologically differentiated. Female Anopheles mosquito is sanguivorous whereas male Anopheles mosquito sucks nectar.

Post anal tail is present in chordates at some stage in the life.

Haemocyanin is the pigment carrying O2 in molluscs. Annelids have erythrocruosin.

Mimicry is resemblance of an organism to its natural surroundings, a non living object or another organism for concealing itself from its natural predators or preys.

Presence of notochord in any stage of the life cycle is a major chordate characteristic.

Paramecium has two types of nucleus, a larger macronucleus involved with the vegetative activities and a smaller involved with reproduction.

Obelia exhibits polymorphism. Round worm (Ascaris) exhibits sexual dimorphism. Pheretima is hermaphrodite and Chameleon shows camouflage.

Sea squirt is Herdmania. Dolphin is an aquatic mammal and breathes through lungs.

Liver fluke (Fasciola hzpatica) is a digenetic endoparasite i.e., it's life cycle completes within two hosts. The primary host is sheep and the secondary or intermediate host is fresh water gastropod, snail. Fasciola kepatica infects it's intermediate host at miracidium stage and it's primary host at metacercaria stage.