Class Mammalia

Q. A four-chambered heart is present in

1. mammals and reptiles
2. birds and fishes
3. mammals and amphibians
4. birds, mammals and crocodile

Q.

Which of the following is an egg-laying mammal?

1. Duck-billed platypus

2. Kangaroo

3. Whale

4. Pigeon

Q.

Explain how animals in Vertebrata are classified into further subgroups.

Q.

Describe the general characteristics of mammals.

Q. Mammals are unique in possessing

1. milk producing glands
2. hair
3. oil glands
4. Both (A) and (B)

Q.

Which of the following is not viviparous?

1. Whale

2. Elephant

3. Platypus

4. Flying Fox (Bat)

Q.

Mention one unique feature of mammals.

Q. Which among the following features is a difference between birds and mammals?

1. Maintenance of constant body temperature
2. Viviparity
3. Four chambered heart
4. Lungs for gaseous exchange

Q.

In which one of the following the genus name its two characters and its class/phylum are correctly matched?

1. $\begin{array}{ccc}\text{Genus name}& \text{Two Characters}& \text{Class/Phylum}\\ \text{Aurelia}& \text{(a)Cnidoblast}& \text{Coelenterata}\\ & \text{(b)Organ level of organization}& \end{array}$

2. $\begin{array}{ccc}\text{Genus name}& \text{Two Characters}& \text{Class/Phylum}\\ \text{Salamandra}& \text{(a)A tympanum represents ear}& \text{Amphibia}\\ & \text{(b)Fertilization is external}& \end{array}$

3. $\begin{array}{ccc}\text{Genus name}& \text{Two Characters}& \text{Class/Phylum}\\ \text{Pteropus}& \text{(a)Skin possess hair}& \text{Mammalia}\\ & \text{(b)Viviparous}& \end{array}$

4. $\begin{array}{ccc}\text{Genus name}& \text{Two Characters}& \text{Class/Phylum}\\ \text{Ascaris}& \text{(a)Body segmented}& \text{Annelida}\\ & \text{(b)Males and females are distinct}& \end{array}$

Q.

Which one of the following sets of animals share a four chambered heart?

(a) Amphibian, Reptiles, Birds

(b) Crocodiles, Birds, Mammals

(c) Crocodiles, Lizards, Turtles

(d) Lizards, Mammals, Birds

Q. In which of the following options the types of heart is correctly matched to their respective group of animals?

1. Two chambered heart - Fishes and amphibians
2. Four chambered heart - Birds and mammals
3. Three chambered heart - Amphibians and birds
4. Three chambered heart - Reptiles and mammals

Q. Dentition in mammals is

1. homodont
2. heterodont
3. monophyodont
4. polyphyodont

Q. Which of the following characters is not typical of the class Mammalia ?

1. Thecodont dentition
2. Alveolar lungs
3. Ten pairs of cranial nerves
4. Seven cervical vertebrae

Q.

Pinnae are present in

1. Chamaeleon

2. Testudo

3. Hyla

4. Macropus

Q. Bird differs from bat in the absence of

1. homeothermy.
2. trachea.
3. four chambered heart.
4. diaphragm.

Q. In which one of the following sets of animals do all the four give birth to live young ones?

1. Kangaroo, Hedgehog, Dolphin, Loris
2. Shrew, Bat, Cat, Kiwi
3. Lion, Bat, Whale, Ostrich
4. Platypus, Penguin, Bat, Hippopotamus

Q. One of the following is a very unique feature of the mammalian body :

1. Homeothermy
2. Presence of diaphragm
3. Four-chambered heart
4. Rib cage

Q.

What are the five main animal groups?

Q.

Which of the following sets of animals belong to a single taxonomic group?

(a) Cuttlefish, jellyfish, silverfish, dogfish, starfish

(b) bat, pigeon, butterfly

(c) Monkey, chimpanzee, man

(d) Silkworm, tapeworm, earthworm

Q. Which one of the following animals is correctly matched with its taxonomic category?

1. Housefly - Musca, an order
2. Humans - Primata, the family
3. Tiger - Tigris, the species
4. Cuttle fish - Mollusca, a class

Q. This question consists of two statements, Assertion and Reason.

While answering this question you are required to choose any one of the following five responses.

Assertion: The duck-billed platypus and the spiny anteater, 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.

Q.

Which of the following is an oviparous mammal?

1. kangaroo

2. flying fox

3. blue whale

4. platypus

Q. Dog fish belongs to class _________ while a dog belongs to class _________.

1. Reptilia, Mammalia
2. Chondrichthyes, Mammalia
3. Osteichthyes, Mammalia
4. Amphibia, Amphibia

Q. Exclusively present in mammals

1. Viviparity
2. Pinna
3. Homeothermy
4. 4 chambered heart

Q. Read the following statements.

(a) Three subphyla of phylum Chordata are Tunicata, Cephalochordata and Vertebrata.
(b) In Ascidia, notochord is present only in larval tail.
(c) Notochord persists throughout life in all vertebrates.
(d) Nerve cord is ventral, solid and double in chordates.

Choose the option with only incorrect statements.

1. (a) and (c) are correct
2. (a) and (d) are correct
3. (b) and (c) are incorrect
4. (c) and (d) are incorrect

Q.

Which of the following is not a character common to all chordates?

1. notochord

2. gill slits

3. dorsal hollow nervous system

4. hair

Q.

What is sella turcica?

Q.

Jaws are absent in:

1. Balanoglossus
2. Myxine
3. Vertebrates
4. Petromyzon

1. (i), (iv)

2. (ii), (iv)

3. (i), (ii)

4. (iii), (iv)

Q.

Is crocodile a homeotherm?

Q. Mammals are most adapted among the vertebrates. Elaborate.