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| Genus name | Two characters | Class/Phylum | |
| $(a)$ | Ascaris | $(i)$ Body segmented | Annelida |
| $(ii)$ Males and females distinct | |||
| $(b)$ | Salamandra | $(i)$ A tympanum represents ear | Amphibia |
| $(ii)$ Fertilization is external | |||
| $(c)$ | Pteropus | $(i)$ Skin possesses | Mammalia |
| $(ii)$ Oviparous | |||
| $(d)$ | Aurelia | $(i)$ Cnidoblasts | Coelenterata |
| $(ii)$ Organ level of organization |
$(i)$ Cockroaches are brown or black bodied animals that are included in class insecta of phylum arthropoda.
$(ii)$ Males bear a pair of short, thread like anal styles which are absent in females.
$(iii)$ Heart of cockroach consists of elongated muscular tube lying along mid dorsal line of thorax and abdomen.
$(iv)$ The nymph grows by moulting about $13$ times to reach the adult form.