Question

give two example each organisms belonging the following phylums 1) arthopoda 2) mollusca 3) protochordata.

Answer 1

basic examples of arthropods sorted by the non-extinct subphyla:

Chelicerata: horseshoe crabs, spiders, scorpions, sea spiders and mitesMyriapoda: millipedes, centipedes, pauropods and symphylans (known as glasshouse symphylans or garden centipedes)Crustacea: brine shrimp, barnacles, lobsters, crabs, shrimp and remipedesHexapoda: insects and three orders of entognatha: collembola, proturans and diplura
Cuttlefish, squid, snails and scallops are molluscs as are clams, sea hares, nudibranchs, mussels, oysters and are example of molluscs
Example. Of protocho data are Balanoglossus, Saccoglossus, Herdmania, Amphioxus, Doliolum, Salpa etc.