$A$ shell,as a body covering,is not present in which of the following?
- ACephalopoda
- BProtozoa
- CBivalvia
- DCrustaceans
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Similar Questions
Members of which group are not deuterostomes?
Medium
View SolutionMatch the items in Column-$I$ with Column-$II$ and select the correct option:
Column-$I$ Column-$II$ $(A)$ Fish $(i)$ Two atria and one ventricle $(B)$ Frog $(ii)$ One atrium and one ventricle $(C)$ Snake $(iii)$ Two atria and two ventricles $(D)$ Ostrich $(iv)$ Two atria and incompletely divided ventricle
| Column-$I$ | Column-$II$ |
| $(A)$ Fish | $(i)$ Two atria and one ventricle |
| $(B)$ Frog | $(ii)$ One atrium and one ventricle |
| $(C)$ Snake | $(iii)$ Two atria and two ventricles |
| $(D)$ Ostrich | $(iv)$ Two atria and incompletely divided ventricle |
Easy
View SolutionMatch the following columns:
Column-$I$ Column-$II$ $I$. Choanocytes $p$. Cnidaria $II$. Cnidoblasts $q$. Platyhelminthes $III$. Flame cells $r$. Porifera $s$. Aschelminthes
| Column-$I$ | Column-$II$ |
| $I$. Choanocytes | $p$. Cnidaria |
| $II$. Cnidoblasts | $q$. Platyhelminthes |
| $III$. Flame cells | $r$. Porifera |
| $s$. Aschelminthes |
Medium
View Solution$Monocystis$ belongs to the order:
Easy
View SolutionWhich of the following is an incorrect pair regarding the classification of organisms?
Medium
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