Q- Both insects and arachnids are placed in Phylum Arthropoda because they are similar in certain characters. Enlist these similarities.
Answer- There are several similarities between insects and arachnids that are placed in Phylum Arthropoda. Some of the similarities in both insects and arachnids are as follows:
1. Both insects and arachnids had joined legs.
2. Both insects and arachnids are haemocoelomates.
3. Both v are covered by sclerotised exoskeleton.
4. Both insects and arachnids have open circulatory system with colourless blood called as haemolymph.