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प्रश्न
Write down four characters of Osteichtyes.es.
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उत्तर
(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).
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संबंधित प्रश्न
How do annelid animals differ from arthropods?
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 one difference between the following pair:
Invertebrates and Vertebrates
Write down four main characters of Annelida.
Define the term hermaphrodite.
Write down four characters of Chondrichtyes.
Describe some flight adaptations of the birds.
Describe general characteristics of phylum Annelida.
Explain the general characters of phylum Arthropoda.
Rewrite the following scientific names correctly.
ficus religiosa (peepal), zea Mays (maize) and Bombyx Mori (silk moth).
What are the group names of the following categories of animals?
Animals with three pairs of legs ___________
Write down a flow chart showing subdivisions of kingdom Animalia.
Fill in the blanks:
Bath sponge belongs to phylum ______.
Choose the correct answer: Mosquito is included in insects because
Write the binomial name of
- Human being
- Paddy
Write short notes on – Binomial Nomenclature.
Assertion (A): Reptiles are warm-blooded animals.
Reason (R): They have scales.
Bilaterally symmetrical and acoelomate animal are exemplified by:
Assertion (A): All vertebrates are chordates but all chordates are not vertebrate.
Reason (R): The members of subphylum vertebrata possess notochord, during the embryonic period, the notochord is replaced by a cartilaginous or bony vertebral column in adults.
In the light of the above statements, choose the correct answer from the options given below:
Consider the following statements:
- Annelids are true coelomates
- Poriferans are pseudocoelomates
- Aschelminthes are acoelomates
- Platyhelminthes are pseudocoelomates
Choose the correct answer from the options given below:
