Question

Two importants characters of arthopoda?

Answer 1

1. They have jointed appendages. Hence they are called arthropods. 2. Body of these animals is triploblastic,eucoelomate, bilaterally symmetrical and segmented. 3. These animals are unisexual. 4. Chitinous exoskeleton is present around their body. 5. Examples: Crab, spider, scorpion,millipede, butterfly, cockroach,honey bee,etc.

Answer 2

Organ-system level of body organisation
Open circulatory system
Internal fertilisation
Sensory organs - antennae,eyes,....
Mostly oviparous
Respiratory organs are gills,book gills,book lungs or tracheal system
E.g:- prawn ,scorpion