Amphibians do not have the following:

Which one is a true fish?

$A$ plant specimen was found with rhizoids instead of differentiated roots.
$(a)$ Identify the group to which it belongs.
$(b)$ Write any two characteristics of this group.
$(c)$ Draw the diagram of a plant belonging to this group.

List out some common features in cat,rat and bat.

Explain the following terms:
$(a)$ Phanerogams
$(b)$ Symbiosis
$(c)$ Binomial Nomenclature

Hard calcium carbonate structures are used as a skeleton by