Movement of coelomic fluid helps in locomotion of

What type of body cavity (coelom) is present in an earthworm?

$A$: True coelom originated for the first time in phylum $Annelida$.
$R$: It allowed the animal to have an alimentary canal longer than the body and space for storing gametes.

Botryoidal tissue is found in

$A$ suctorial mouth is present in

Select the correct option:
$(1)$ Annelids are the first animals to possess a circulatory system.
$(2)$ The heart is called myogenic.