Class Aves

Q.

What are the modifications that are observed in birds that help them fly?

Q. All the following statements are correct about Aves but one is wrong. Which one is wrong?

1. Fertilisation is internal
2. They are oviparous and development is direct without exception
3. They are homeothermal animals
4. All the flightless birds have sternum with keel

Q. Crop and Gizzard are present in

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

Q.

Which is Australias national bird?

Q.

What is the locomotory organ in fish and bird respectively?

1. wings-fins

2. fins-wings

3. wings-legs

4. Legs-fins

Q. Birds and mammals share one of the following characteristics as a common feature:

1. Pigmented skin
2. Viviparity
3. Pneumatic bones
4. Homeothermy

Q. In birds, the are modified into wings.

1. hind limb
2. feathers
3. forelimbs
4. claws

Q.

What does operculum mean?

Q.

_______ is the largest flightless bird.

1. Emu

2. Penguin

3. Turkey

4. Ostrich

Q. The forelimbs in birds are modified into

1. patagium
2. wings
3. feathers
4. keel

Q.

Explain pneumatic bones in birds?

Q.

Flightless bird is:

1. Neophron

2. Struthio

3. Pavo

4. Corvus

Q.

Bones with air cavities occur in

1. Alligator

2. Corvus

3. Naja

4. Canis

Q.

What is the importance of pneumatic bones and air sacs in Aves?

Q.

In birds, ___ are modified into feathers.

Q. How many of the following characteristics are common between reptiles and birds $?$
a. Four-chambered heart
b. Scales
c. Homoiothermous (warm-blooded)
d. Dioecious and internal fertilisation
e. Ovipary and direct development

1. $2$
2. $3$
3. $5$
4. $4$

Q. Pneumatic bones are found in

1. house lizard
2. flying fish
3. pigeon
4. tadpole of frog

Q.

Name the national bird of india

Q. Identify the animal in the image given below.

1. Macaca
2. Delphinus
3. Rattus
4. Pteropus

Q. Among which of the following animals do we see the presence of a gizzard?

1. Birds and snakes
2. Birds, earthworm and cockroach
3. Earthworm and sponges
4. Birds and roundworms

Q.

What is the role of feathers?

Q. Which among the following features of Aves help in reducing the weight of the body?

1. Presence of single ovary
2. Absence of urinary bladder
3. Pneumatic bones
4. All of these

Q. The long bones are hollow and connected by air passage. These are characteristic of

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

Q. The birds differ from reptiles in

1. having the ability to regulate body temperature
2. being oviparous
3. being vertebrates
4. having scales on the skin

Q. Identify the bird shown in the image.

1. Psittacula
2. Pavo
3. Neophron
4. Struthio

Q. Which among the following does not help flight in birds?

1. Pneumatic bones
2. Air sacs
3. Wings
4. Gizzard

Q. All the following statements are correct about Aves but one is wrong. Which one is wrong?

1. Fertilisation is internal
2. They are oviparous and development is direct without exception
3. They are homeothermal animals
4. All the flightless birds have sternum with keel

Q. The birds differ from reptiles in

1. having scales on the skin
2. having the ability to regulate body temperature
3. being oviparous
4. being vertebrates

Q. Fill in the blanks: a. In birds, air sacs connected to ... l... supplement respiration. b. The class name reptilia refers to their creeping or ...2... mode of locomotion. c. In amphibians, the eyes ...3... eyelids. d. Cyclostomes are ….4… but migrate for spawning to …5... water.

1. 1-lungs, 2 -crawling, 3 -do not have, 4 -marine, 5 -fresh
2. 1-lungs, 2 -crawling, 3-have, 4-fresh water, 5 -marine
3. 1-lungs, 2 -crawling, 3 -have, 4-marine, 5 -fresh
4. 1-pneumatic bones, 2-swimming, 3 - do not have, 4 -marine, 5 -fresh

Q. Why are whales not considered to be fishes? ​