Theory questions and answers
Answer to the theory questions.
The phylum without organs includes the phylum porifera and the body symmetry is irregular.
The phylum without cephalization is that of phylum porifera and phylum echinodermata
Not all the organisms on the table have three germs layers. Those without 3 germ layers are phylum cnidarians and phylum porifera
Phylum arthropoda has more species compared to other phyla and few examples include; various subphylum’s such as trilobitomorpha, chelicerata, myriapoda, crustacea, hexapoda. Subphyla chelicerata include those; arachnida, xiphosura, pycnogonida and eurypteridia.
In terms of differences in fishes anatomical structure fishes could be classified as jawless Continue reading...