How many of the following animals possess both an open circulatory system and Malpighian tubules as their excretory structures? Apis, Bombyx, Locusta, Palaemon, Limulus, Pheretima, Pila

Step-by-step solution

The question requires identifying animals that possess both an open circulatory system and Malpighian tubules. Malpighian tubules are the characteristic excretory structures of insects. Apis, Bombyx, and Locusta are insects (phylum Arthropoda) and possess both an open circulatory system and Malpighian tubules. Palaemon is a crustacean (phylum Arthropoda) with an open circulatory system, but its excretory organs are antennal glands or green glands. Limulus is an arthropod with an open circulatory system, but it lack