Chordata
Chordata: Overview
This topic covers concepts such as, Class Chondrichthyes, Superclass Tetrapoda, Class Amphibia and Class Osteichthyes etc.
Important Questions on Chordata
Gambusia fish has been introduced in lakes and ponds of India to control a deadly disease. It feeds on larva of
All mammals without any exception are characterized by
Which one of the following animals is correctly matched with its one characteristic and the taxon?
The long bones are hollow and connected by air passage. They are characteristic of
Assertion: Birds have one ovary.
Reason: This reduces the body weight for flight.
Assertion: The duck-billed Platypus and the spiny ant-eater both are egg-laying animals, yet they are grouped under mammals.
Reason: Both of them have seven cervical vertebrae and 12 pairs of cranial nerves.
What is the difference between primates and non primates ?
Following diagram of fish shows which kind of body plan? Explain its types also if any.
Study the following statements about the endoskeleton of birds.
I) Skull is dicondylic.
II) Ribs are single headed.
III) Clavicles along with interclavicle form furcula.
IV) Heterocoelous vertebrae.
Identify correct statements from the above.
Match the following:
| Zoological name | Common name | ||
| (A) | Hemidactylus | (I) | Flying lizard |
| (B) | Bungarus | (II) | Flying fox |
| (C) | Draco | (III) | Wall lizard |
| (D) | Pteropus | (IV) | Pond snake |
| (V) | Krait |
The correct match is
Study the following table and pick up the incorrect combination(s).
| Sr.No. | Group | Salient feature | Example |
| (I) | Cyclostomata |
Absence of renal portal systenl |
Lamprey |
| (II) | Gnathostomata | Internal ears with three semi circular canals each | Lancelet |
| (III) | Chondrichthyes | Heterocercal caudal fin | Torpedo |
| (IV) | Osteichthyes | Absence of air bladder | Catla |
Which of the following are fresh water cartilaginous fishes?
