How many statements are correct regarding the organisms shown in following figure?
a) It belongs to the class Cyclostomata.
b) It has 6 to 15 pairs of gill slits.
c) Their body is devoid of scales.
d) In males, pelvic fins bear claspers.
Important Questions on Animal Kingdom
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) | 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 |
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
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 |
Match the following correctly related to cartilaginous fishes ?
| Column I | Column II | ||
| (i) | Sphyma | (a) | Sting ray |
| (ii) | Torpedo | (b) | Dog fish |
| (iii) | Trygon | (c) | Saw fish |
| (iv) | Pristis | (d) | Electric ray |
| (v) | Scoliodon | (e) | Hammer headed shark |
Forelimbs are modified into wings and hindlimbs are modified for walking and swimming.
Heart completely four-chambered.
They are homeotherms.
They are oviparous and development is direct.
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
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
