Which of the following is a characteristic of | vedclass

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(B) Phylum $Echinodermata$ exhibits the following characteristics:$1$. They are mostly dioecious (sexes are separate).$2$. Fertilization is usually ex

Vedclass · Accepted Answer

Dioecious,external fertilization,indirect development with free-swimming larvae.

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(B) Phylum $Echinodermata$ exhibits the following characteristics:$1$. They are mostly dioecious (sexes are separate).$2$. Fertilization is usually external.$3$. Development is indirect,meaning they have a larval stage that is free-swimming and morphologically different from the adult.$4$. Therefore,option $B$ is the most accurate description of their reproductive and developmental traits.

Column-$I$ (Animal)	Column-$II$ (Genus)
$P$. Starfish	$I$. Antedon
$Q$. Sea urchin	$II$. Echinus
$R$. Sea lily	$III$. Cucumaria
$S$. Sea cucumber	$IV$. Asterias
$T$. Brittle star	$V$. Ophiura

Which of the following is a characteristic of Phylum $Echinodermata$?

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Bipinnaria is the larva of

In Echinodermata,the digestive tract is ..........

Match the following columns:
Column-$I$ (Animal) Column-$II$ (Genus)
$P$. Starfish $I$. Antedon
$Q$. Sea urchin $II$. Echinus
$R$. Sea lily $III$. Cucumaria
$S$. Sea cucumber $IV$. Asterias
$T$. Brittle star $V$. Ophiura

Assertion : Ambulacral system plays a major role in locomotion of echinoderm.
Reason : Hydraulic pressure of fluid and contraction of muscle of tube feet make possible movement of echinoderm.

Which animal group possesses a water vascular system?

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