They have remote nipples, that are used for warmth.
Protostomes
"They are neither. This is because they do not have a true gut. Protostomes are annelidids(earthworms) Mollusca(clams, snails, octopus, etc.) and arthropods which are your insects or spiders. The only Deuterostomes are Phlya Chordota and Echinodermata." The above answer is incorrect. Plathyhelminthes are protostomes. There are many, MANY groups of protostomes besides annelids, molluscs, and arthropods.
embryological development
The ability to move by flying
Yes
They are protostomes.
protostomes
Most invertebrate animals are protostomes.
Yes, since they are annelids, they are protostomes.
Its tail or abdomen is segmented
Crayfish are classified as arthropods, because of their characteristic segmented bodies, chitinous exoskeleton, and joint appendages.
A crayfish has segments, which are sections of a body that are separated by a crease, so it might be determined as segmented because it has only two so it may be classified but it might not. Worms have many segments.
Yes, molluscs fit into the group known as protostomes.
Neither are protostomes. Chordates, Hemichordates, and Echinoderms are all deuterostomes (in that the blastopore forms the anus first). In protostomes, the blastopore forms the mouth first.
Deuterostomes. All chordates such as birds and mammals are deuterosomes.
Protostomes
Protostomes .