Give one example each for an animal possessing placoid scales and that with cycloid scales.
(N/A) $\rightarrow$ Placoid scales are characteristic of cartilaginous fishes (Chondrichthyes),for example,$Scoliodon$ (Dogfish).
$\rightarrow$ Cycloid scales are characteristic of bony fishes (Osteichthyes),for example,$Labeo$ $rohita$ (Rohu).
$\rightarrow$ Cycloid scales are characteristic of bony fishes (Osteichthyes),for example,$Labeo$ $rohita$ (Rohu).
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Similar Questions
Given are the four matches of phyla with their characteristic cells:
$A$. Coelenterata - Nematocytes
$B$. Porifera - Choanocytes
$C$. Ctenophora - Solenocytes
$D$. Platyhelminthes - Nephrocytes
Mark the option that has both correct matches.
$A$. Coelenterata - Nematocytes
$B$. Porifera - Choanocytes
$C$. Ctenophora - Solenocytes
$D$. Platyhelminthes - Nephrocytes
Mark the option that has both correct matches.
MediumAIIMS 2013
View SolutionClassify the following animals based on their body symmetry (radial or bilateral): Coelenterates,Ctenophores,Annelids,Arthropods,and Echinoderms.
Medium
View SolutionMention one example each for animals with a chitinous exoskeleton and those covered by a calcareous shell.
Easy
View SolutionIn which one of the following is the genus name,its two characters,and its class/phylum correctly matched?
Genus Name
Two Characters $\&$ Class/Phylum
$A$. $Ascaris$
$(i)$ Body segmented,$(ii)$ Males and females distinct; Phylum: $Annelida$
$B$. $Salamandra$
$(i)$ $A$ tympanum represents ear,$(ii)$ Fertilization is external; Class: $Amphibia$
$C$. $Pteropus$
$(i)$ Skin possesses hair,$(ii)$ Oviparous; Class: $Mammalia$
$D$. $Aurelia$
$(i)$ Cnidoblasts present,$(ii)$ Organ level of organization; Phylum: $Coelenterata$
| Genus Name | Two Characters $\&$ Class/Phylum |
|---|---|
| $A$. $Ascaris$ | $(i)$ Body segmented,$(ii)$ Males and females distinct; Phylum: $Annelida$ |
| $B$. $Salamandra$ | $(i)$ $A$ tympanum represents ear,$(ii)$ Fertilization is external; Class: $Amphibia$ |
| $C$. $Pteropus$ | $(i)$ Skin possesses hair,$(ii)$ Oviparous; Class: $Mammalia$ |
| $D$. $Aurelia$ | $(i)$ Cnidoblasts present,$(ii)$ Organ level of organization; Phylum: $Coelenterata$ |
MediumAIPMT 2011
View SolutionWhich of the following is a living fossil?
Easy
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