The only incorrectly matched pair is

Match the following group of organisms with their respective distinctive characteristics and select the correct option:

Organisms	Characteristics
$(a)$ Platyhelminthes	$(i)$ Cylindrical body with no segmentation
$(b)$ Echinoderms	$(ii)$ Warm-blooded animals with direct development
$(c)$ Hemichordates	$(iii)$ Bilateral symmetry with incomplete digestive system
$(d)$ Aves	$(iv)$ Radial symmetry with indirect development

Which of the following is the correct matching of an animal,its characteristics,and its taxon?

In the given examples,how many animals are viviparous? Corvus,Columba,Macropus,Pteropus,Calotes,Hemidactylus,Psittacula,Struthio and Macaca.

$A$ mature Hydra usually bears

Fill in the blank spaces appropriately in the table below:

Phylum/Class	Excretory organ	Circulatory system	Respiratory organ
Arthropoda	$...............$	$...............$	Lungs/Gills/Tracheal system
$...............$	Nephridia	Closed	Skin/Parapodia
$...............$	Metanephridia	Open	$...............$
Amphibia	$...............$	Closed	Lung