The phylum Arthropoda contains animals with segmented appendages on their body segments. Arthropods occupy every habitat, and are in many respects the most successful animal group on Earth. There are conservatively over 1 million species of living arthropods. Biologist E.O. Wilson estimates there are 10 million species, 9 million of which are arthropods. Certain groups of arthropds have extremely complete [...]
In this article we will discuss about the classification of phylum arthropoda. 1. Arthropoda is the largest phylum comprising bilaterally symmetrical, triploblastic, coelomate invertebrates. 2. Body segmented but most species exhibit some degree of reduction in metamerism. 3. The segments usually bear paired, lateral and jointed appendages, variously modified as jaws, gills, legs, etc. 4. The body is covered with [...]
The following points highlight the top three modes of transmission in insects. The modes are: 1. Mechanical Transmission 2. Biological Transmission 3. Transovarial Transmission. Mode # 1. Mechanical Transmission: This may be indirect. The simplest method is the indirect mechanical transmission where the insects take up the role of passive carriers of diseases. They only pick up the organisms causing [...]