Sponges and coelenterates resemble each other in being

Radial symmetry occurs in

Mark the odd member from the following:

Which of the following pairs are correctly matched?

Animals	Morphological features
$(i)$ Crocodile	$4$-chambered heart
$(ii)$ Sea urchin	Parapodia
$(iii)$ Obelia	Metagenesis
$(iv)$ Lemur	Thecodont

The term "phylum" in animal classification was coined by

Identify the correct terms for the following analogy-based questions:
$(i)$ Porifera : Choanocytes :: Platyhelminthes : ....
$(ii)$ Chondrichthyes : Placoid scales :: Osteichthyes : ....