How many chambers are present in the heart of fishes and frogs?

Is the given figure of an angiosperm plant a dicot or a monocot? Differentiate between dicot and monocot plants on the basis of venation in the leaf and the number of cotyledons in the seed.

Classify the following organisms based on the absence/presence of a true coelom (i.e., acoelomate, pseudocoelomate, and coelomate): $Spongilla$, $Sea \text{ } anemone$, $Planaria$, $Liver \text{ } fluke$, $Wuchereria$, $Ascaris$, $Nereis$, $Earthworm$, $Scorpion$, $Birds$, $Fishes$, $Horse$.

Which of the following is not an aquatic animal?

Classify the following organisms based on the absence $/$ presence of true coelom,i.e.,acoelomate,pseudocoelomate,and coelomate:
$(a)$ Scorpion
$(b)$ Sea anemone
$(c)$ Ascaris
$(d)$ Earthworm
$(e)$ Wuchereria
$(f)$ Nereis

The locomotory organs of $Echinodermata$ are: