Consider the following four statements (I-IV) about certain desert animals such as kangaroo rat.
I. They have dark colour and high rate of reproduction and excrete solid urine.
II. They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs.
III. They feed on dry seeds and do not require drinking water.
IV. They excrete very concentrated urine and do not use water to regulate body temperature.
Which two of the above statements for such animals are true?
I. They have dark colour and high rate of reproduction and excrete solid urine.
II. They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs.
III. They feed on dry seeds and do not require drinking water.
IV. They excrete very concentrated urine and do not use water to regulate body temperature.
Which two of the above statements for such animals are true?
Important Questions on Animal Kingdom
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
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
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
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 (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?
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 |
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.
Match the following columns and select the correct option:-
| Column-I | Column-II | ||
| (a) | Aptenodytes | (i) | Flying fox |
| (b) | Pteropus | (ii) | Angel fish |
| (c) | Pterophyllum | (iii) | Lamprey |
| (d) | Petromyzon | (iv) | Penguin |
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 |
| Zoological name | Common name | ||
| A | Ornithorhyncus | I | Flying fox |
| B | Pteropus | II | Kangaroo |
| C | Panthera | III | Blue whale |
| D | Macropus | IV | Tiger |
| V | Duck billed platypus |
The correct match is
