Phylum Aschelminthes or Nemathelminthes (Greek; nema = thread; helmins = worm) The Roundworms In phylum Aschelminthes, the organisms are also called roundworms because the body is circular in cross-section. These organisms are endoparasites. They are cylindrical, unsegmented, and triploblastic animals. The roundworms are mostly parasitic and cause diseases in plants, Read more…
Phylum – Porifera – (Pore-bearing) Introduction: The porifers are commonly known as sponges. Porifers consisting the most primitive multicellular animals. These are pore-bearing animals, the body does not consist of organs and they can regenerate their lost parts. The phylum includes around 5ooo species. These are the first multicellular animals. Read more…
Animal kingdom – Classification The kingdom is the second-highest taxonomic rank below the domain. Under the kingdom Animalia, the multicellular, eukaryotic organisms with few exceptions are placed. Basis of Classification of Animal Kingdom Some common features are used as the basis of the classification of animals. These are common to Read more…
Angiosperms (Angios- vessel, sperma- seeds) Features of Angiosperms Angiosperms are flowering plants, in which the flower is developed by ovule and pollen grain. Seeds are found always enclosed in fruits in angiosperms. These are the most familiar plant-like mango, peas, coconut, wheat, and rice. The angiosperms diversified extensively during the Read more…
Gymnosperms Gymnosperms: The gymnosperms are spermatophytes i.e. seed-producing plants. The Gymnosperms (Gymno: naked, Sperma-seed) are the form of a plant in which the ovules are not enclosed by the ovary wall. In these plants, the ovule remains uncovered i.e. naked before and after fertilization. After fertilization, developed seeds are also Read more…