Mammalia

Q.

What are homologous organs?

Q.

Offsprings of oviparous animals are at greater risk of survival compared to those of viviparous animals because

1. Embryo does not develop completely

2. Proper embryonic care and protection is absent

3. Genetic variations do not occur

4. Progenies are of smaller size

Q.

Write the difference between male and female cones of pinus ?

Q.

Crocodile and penguin are similar to whale and dogfish in which one of the following features?

1. Lay eggs and guard them till they hatch

2. Possess bony skeleton

3. Possess a solid single-stranded central nervous system

4. Have gill slits at some stage

Q.

Which of the following endoparasites of humans does show viviparity?

1. Ascaris lumbricoides

2. Trichinella spiralis

3. Enterobius vermicularis

4. Ancylostoma duodenale

Q.

Which of the following is not a characteristic feature of mammals?

1. Mammals have four-chambered hearts

2. They have diaphragm

3. They are not warm-blooded animals

4. They have fur on their body

Q. What is a dorsal fin and what is its function

Q. Mammals are warm-blooded animals with mammary glands.

1. True
2. False

Q.

Freshwater fish is kept in a sea water and why?

Q. DB between chondrichthyes and osteichthyes

Q.

Choose the correct option-

A marine cartilaginous fish that can produce electric current is?

1. Scoliodon

2. Torpedo

3. Trygon

4. Pristis

Q.

Which animal is called a connecting link between Reptiles and Mammals?​

Q.

Write the important characteristics of group Mammalia.

Q. Are all four chambered heart organisms warm blooded.What about crocodiles?

Q.

How many chambers are present in the heart of (a) Fishes (b) Frog.

Q.

What is camouflage? Why is it important for animals? Give two examples. [3 MARKS]

Q.

Given below is a list of ten animals each followed by three terms or features. Underline the term which does not match with the animal.

(i) Amoeba - Nucleus, tentacle, food vacuole.

(ii) Hydra - Invertebrata, Cnidaria, Crustacea.

(iii) Fish - Gills, paired fins, ear drum.

(iv) Earthworm - Invertebrata, Annelida, Insecta.

(v) Grasshopper - Wings, trachea, proboscis.

(vi) Butterfly - Insecta, Invertebrata, Mollusca.

(vii) Whale - Gills, mammary glands, fat under the skin.

(viii) Pigeon - Feathers, wings, hair.

(ix) Monkey - External ear, sweat glands, lateral line.

(x) Bat - Aves, Mammalia, Chordata.

Q. Which of the following is an egg-laying mammal?

Q.

The air bladder provides buoyancy in

1. Torpedo

2. Labeo

3. Carcharodon

4. Trygon

Q.

Aves are cold-blooded animals.

1. True

2. False

Q.

The buccal cavity, food pipe or oesophagus, stomach, small intestine, large intestine, rectum and anus-These are components of which system of our body?

1. Excretory system

2. Respiratory system

3. Nervous system

4. Digestive system

Q.

Explain the meaning of the terms cold-blooded and warm-blooded (homeothermal).

Q.

A Cuckoo laying eggs in the nest of other species of birds is an example of

1. Hyperparasitism

2. Endoparasitism

3. Adelphoparasitism

4. Brood parasitism

Q.

What are the 7 classes of mollusks?

Q. Question 22
Two chambered heart occurs in

(a) crocodiles
(b) fish
(c) aves
(d) amphibians

Q.

Which of the following is not a vertebrate?

1. Bird

2. Frog

3. Snail

4. Whale

Q. Pick out the odd one out and justify your choice by giving reasons
Moss, Fern, Pinus , Spirogyra.

Q.

How are sub-phylum gnathostomata classified?

Q.

Birds and mammals need more energy than other class of animals like reptiles because

1. They move faster.

2. They breath faster.

3. They have to keep their body warm.

4. They eat more complex food which needs more energy to break down.

Q. Which of the following class of Animalia have hair on their skin?

1. Mammalia
2. Aves
3. Amphibia
4. Reptilia