Advertisements
Advertisements
Question
Write down four characters of Osteichtyes and give two examples.
Advertisements
Solution
Characteristics of Osteichthyes:
(i) Marine and fresh-water fish with partial or full bony endoskeleton.
(ii) They have a spindle-shaped body and the skin is either naked or covered with cycloid or ctenoid scales.
(iii) Four pairs of gills are present for respiration. The gills are covered by operculum and are filamentous.
(iv) Cloaca is absent and anal and urogenital apertures are distinct. They excrete ammonia (ammonotelic animals).
Examples: Labeo and Protopterus.
APPEARS IN
RELATED QUESTIONS
How do annelid animals differ from arthropods?
What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?
Match the following:
| Column I | Column II | ||
| (a) | Operculum | (i) | Ctenophora |
| (b) | Parapodia | (ii) | Mollusca |
| (c) | Scales | (iii) | Porifera |
| (d) | Comb plates | (iv) | Reptilia |
| (e) | Radula | (v) | Annelida |
| (f) | Hairs | (vi) | Cyclostomata and Chondrichthyes |
| (g) | Choanocytes | (vii) | Mammalia |
| (h) | Gill slits | (viii) | Osteichthyes |
Write down four main characters of Annelida.
Define the term hermaphrodite. Give two examples.
Write down four general characters of phylum Arthropoda. Give two examples.
Write down four general characters of phylum Echinodermata. Give two examples.
Describe general characteristics of phylum Annelida. Give one example each class of Annelida.
Explain the general charaters of phylum Mollusca. Give one example of following classes of Mollusca;
(i) Gastropoda;
(ii) Pelecypoda;
(iii) Cephalopoda.
Describe the important characters of mammals and birds. Give two examples of each.
Given below is an animal followed by three terms or features. Underline the term which does not match with the animal.
Butterfly- Insecta, Invertebrata, Mollusca
Given below is an animal followed by three terms or features. Underline the term which does not match with the animal.
Bat - Aves, Mammalia, Chordata
Name three animals (belonging to different classes) which breathe by means of lungs but have no external ears (pinnae).
Give four important characters of mammals.
Give two examples of each of the following: Nemathelminthes
Fill in the blanks:
The excretory organs of platyhelminthes are ______.
Choose the correct answer: 'Systema naturae' has been written by
Assertion: Binomial name is the universal name and contains two names.
Reason: It was first introduced by Carolus Linnaeus
Select the INCORRECT statement from the following.
Kingdom Animalia is characterized by
