
Amphioxus is an animal that belongs to Phylum _____.

Important Questions on Diversity in Living Organisms

a) Chondrichthyes have gill slits covered by operculum and Osteichthyes have gill slits without operculum
b) Chondrichthyes have a swim bladder and Osteichthyes do not have a swim bladder
c) Chondrichthyes contain placoid scales and Osteichthyes contain cycloid scales
d) Chondrichthyes contain terminal mouth and Osteichthyes contain ventral mouth

Identify the wrongly matched Scientific and common name:
Scientific name | Common name |
a) Bungarus | Krait |
b) Exocoetus | Flying fish |
c) Trygon | Electric ray |
d) Carcharodon | Dogfish shark |
e) Myxine | Hagfish |

Match the following
List - I | List - II | ||
(a) | Each half of the lower jaw is formed by 6 bones | (i) | Aves |
(b) | Lacrimal and Harderian glands appeared for the first time | (ii) | Reptiles |
(c) | Presence of only right systemic arch | (iii) | Amphibians |
(d) | Each half of the lower jaw is made of single bone | (iv) | Mammals |


Which of the key adaptations helped evolutionary success of Reptiles on land?
A Warm-bloodedness
B. Pulmonary respiration and dry scaly skin
C. Internal fertilisation
D. Amniotic & Cleidoic eggs

Name the classes of Tetrapoda that exhibit the following characters:
Column (A) | Column (B) |
Acrodont | Thecodont |
pairs cranial nerves | pairs cranial nerves |
Cold-blooded | Warm-blooded |
Amphicoelous vertebrae | Amphiplatyan vertebrae |




Statement (S) : The amphibian blood is composed of erythrocytes, leucocytes and thrombocytes. The thrombocytes help in haemostasis.
Reason (R): The haemostasis regulates the body temperature in poikilotherms.
Which of the following is true?


Match the following
List - I | List - II | ||
(a) | Chelonia | (i) | Alligator |
(b) | Rhynchocephalia | (ii) | Chameleon |
(c) | Crocodilia | (iii) | Sphenodon |
(d) | Squamata | (iv) | Testudo |
The correct answer is

Statement I: Sternum appeared for the first time in amphibians.
Statement II: Snakes have pairs of cranial nerves.
The correct option among the following is

Study the following table
Group | Feature | Example | |
Cyclostomata | Renal portal system is absent | Branchiostoma | |
Reptilia | Megalecithal and cleidoic eggs | Tropidonotus | |
Aves | Corpora quadrigemina | Psittacula | |
Amphibia | Columella auris in middle ear | Rhacophorus |
Identify the correct combinations





