Mouth Parts in Insects! 1. Biting and Chewing: This type of mouth parts are supposed to be the most primitive type as the other types are believed to be evolved from biting and chewing type of mouth parts. These consist of the labrum forming upper lip, mandibles, first maxillae, second maxillae forming lower lip, hypo pharynx and the epipharynx. The [...]
The following points highlight the five major disease producing insects. The insects are: 1. Mosquitoes 2. Flies 3. Fleas 4. Bugs 5. Lice. Disease Producing Insect # 1. Mosquitoes: Several species of Anopheles are vectors of human malaria. The female Anopheles bites a malarial patient and takes in malarial Plasmodium along with human blood. Plasmodium multiplies and undergoes sporogony in [...]
The following points highlight the three main types of metamorphosis in insects. The types are: 1. Ametabolic Metamorphosis 2. Heterometabolic Metamorphosis 3. Holometabolic Metamorphosis. Type # 1. Ametabolic Metamorphosis: In lower insects (Collembola, Thysanura) the young which hatches from an egg is a miniature of the adult and is called a nymph, it differs from the adult in having immature [...]