MCQ
Choose the correct option
- APhylum-Mollusca is the third largest phylum
- BPhylum-Arthropoda is the second largest phylum
- CPhylum-Mollusca is the largest phylum
- ✓Phylum-Arthropoda is the largest phylum of Animalia
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$(i)$ 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.
