Plants that do not have well-differentiated body design fall into the group called

Classify organisms of kingdom $Protista$ on the following basis and give an example of each:
$(a)$ Based on structure for locomotion.
$(b)$ Based on mode of nutrition.

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

Why are angiosperms so called? In which structures do the seeds develop? Why are cotyledons considered an important part of seed?

State reasons for the following:
$(a)$ Tapeworm does not have a digestive tract.
$(b)$ Frogs use both skin and lungs for breathing.
$(c)$ Birds have pneumatic/hollow bones.

Which among the following have an open circulatory system?
$(i)$ Arthropoda
$(ii)$ Mollusca
$(iii)$ Annelida
$(iv)$ Coelenterata