Chapter 4

Mammalia means organism which possess (a) Exoskeleton (b) Endoskeleton of bone (c) Mammary gland (d) Two pair of limbs

The following features belong to (1) Exoskeleton include hairs on body, horns and nail. (2) Pinna is present. (3) Heart is four chambered. (4) Warm-blooded (homoiotherm). (5) Thecodont and heterodont teeth. (a) Reptilians (b) Aves (c) Mammals (d) Amphibians

Mammals are adapted for (a) Walking and running (c) Climbing and burrowing (c) Swimming and flying (d) Any of the above

Mammals are mostly (a) Viviparous (b) Oviparous (c) Ovoviviparous (d) All of these

Oviparous mammal is (a) Canis (dog) (b) Felis (cat) (c) Pteropus (flying fox (d) Ornithorhynchus (platypus)

Select the incorrect matching: (a) Kangaroo Macropus (b) Blue whale - Balaenoptera (c) Monkey Macaca (d) Elephas Camel

Find out the incorrect matching: (a) Reptiles Chelone, Testudo, Chameleon (b) Aves \(-\) Psittacula, Aptenodytes, Neophron \(\begin{array}{ll}\text { (c) Mammals } & \- & \text { Elephas, Rattus, Delphinus }\end{array}\) (d) Amphibian Naja, bangarus, Calotes

Aquatic mammal is (a) Panthera tigris (b) Balaenoptera (c) Pteropus (d) Macropus

Which of the following is a 'rat'? (a) Felis (b) Canis (c) Camelus (d) Rattus

Which of the following mammal have aerial adaptation? (a) Felis (b) Canis (c) Bat (d) Macropus

The basic fundamental feature which enables us to broadly classify the animal kingdom are (a) Level of organisation, symmetry (b) Cell organization, coelom (c) Segmentation of notochord (d) All the above

Select the total number of correct statement from the following: (1) Coelenterates have tentacles and bear cnidoblasts. (2) Ctenophores are marine animals with comb plates. (3) Annelids are metamerically segmented animals with a true coelom. (4) The echinoderm posses water vascular system. (5) Hemichordates are a small group of worm like marine animals characterized by cylindrical body with proboscis, collar and trunk. (a) 2 (b) 3 (c) 4 (d) 5

Select the incorrect matching: [A: Phylum, B: Segmentation, C: Circulatory system, D: Distinctive features] [A: Absent, P: Present] A B \(\quad\) C \(\mathbf{D}\) (a) Ctenophore A A Comb plates for locomotion (b) Aschelminthes \(\quad\) A \(\quad\) P \(\quad\) Often worm shaped, elongated \(\begin{array}{llll}\text { (c) Annelid } & \text { P } & \text { P } & \text { Body segmentation like rings }\end{array}\) \(\begin{array}{llll}\text { (d) Arthropoda } & \text { P } & \text { P } & \text { Jointed appendages }\end{array}\)

Assertion: A closed circulatory system is found in annelids. Reason: Annelids posses true coelom.

Assertion: Fertilization in sponge is internal. Reason: Sponges are aquatic organisms.

Assertion: The skeleton of sponges is made up of spicules. Reason: Composition of spicules help in classification of sponges.

Assertion: Acraniata is a group of organisms which do not have distinct cranium. Reason: It includes small marine forms without head.

Assertion: Sponges belong to Porifera. Reason: Sponges have canal system.

Assertion: Birds have one ovary. Reason: This reduces the body weight for flight.

Assertion: Birds are warm blooded. Reason: Birds are able to maintain a constant body temperature.

Assertion: Systematics is the branch of biology that deals with classification of living organisms. Reason: The aim of classification is to group the organisms.

Assertion: All birds, except the ones like koel (cuckoo) build nests for retiring and taking rest during night time (day time for nocturnal). Reason: Koel lays its eggs in the nests of tailor bird.

Assertion: Bats and whales are classified as mammals. Reason: Bats and whales have four-chambered heart.

Assertion: The duck-billed Platypus and the spiny ant-eater, both are egg- laying animals yet they are grouped under mammals. Reason: Both of them have seven cervical vertebrae and 12 pairs of cranial nerves.

Assertion: Coelenterates are triploblastic. Reason: Coelenterates contain mesoderm in between ectoderm and endoderm.

Assertion: Digestive system of platyhelminthes is incomplete. Reason: They have single opening to outside of the body, serve as both mouth as well as anus.

Assertion: Coelenterates, Ctenophores and adult Echinoderms are said to be radial symmetrical. Reason: Their body can be dived into two equal halves in any plane passing through central axis of the body.

Assertion: Obelia shows metagenesis. Reason: Obelia is polymorphic organism.

Assertion: Ascidia belong to sub - phylum urochordata. Reason: Notochord is present in tail of larva stage.

Assertion: Birds have pneumatic bones. Reason: This reduce weight for flight

Assertion: Snake shed their scale as skin cast. Reason: It allow continue growth of snake.

Assertion: All vertebrates are chordates. Reason: Vertebrates posses notochord during the embryonic period.

Assertion: Most sponge's body are said to be asymmetrical. Reason: Body of most sponge can't be divided into two equal half by any plane pass through the centre of body.

Assertion: Aschelminthes are pseudocoelomate. Reason: Body cavity in these organisms is not lined with mesoderm.

Assertion: Porifera to Echinoderms are non-chordates. Reason: Notochord is not formed during embryonic development in these animals.

Assertion: Coelenterates are called cnidarians. Reason: They possess cnidoblasts on tentacles and the body.

Assertion: Bioluminescence is well marked in ctenophores. Reason: All ctenophores are exclusively marine.

Assertion: Annelids shows metameric segmentation. Reason: Body of annelids divided externally as well as internally.

Assertion: Platyhelminthes are known as flat worms. Reason: Platyhelminthes have laterally compressed body.

Assertion: In amphibian skin is generally moist. Reason: They shows cutaneous respiration.