Question

To which phylum does Cockroach belong? Justify your answer with scientific reasons. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> [Textbook Question No.5d Pg no. 75]

Answer 1

• Cockroach belongs to phylum Arthropoda because it possesses all the distinguishing characters of phylum Arthropoda.
• The body of cockroach is bilaterally symmetrical and is divided into head, thorax and abdomen which is covered and protected with a tough layer of chitin.
• The cockroach has three pairs of legs joined together and has two pairs of wings
• It shows the presence of compound eyes that have several small visual units and has a mosaic vision.
• Cockroach possesses an open circulatory system where the haemolymph (blood of cockroach) flows freely through the haemocoel (body cavity of cockroach) with no vessels to conduct the haemolymph.