What is Phylum Platyhelminthes? Definition of Phylum Platyhelminthes Phylum Platyhelminthes, also known as flatworms, comprises bilaterally symmetrical, triploblastic, dorsoventrally flattened invertebrates lacking circulatory, respiratory, and skeletal systems, characterized by a simple digestive system with a single opening and a protonephridial excretory system. Characteristics of Phylum Platyhelminthes Classification of Phylum Platyhelminthes Class 1- Turbellaria (L., turbella= a little … Read more
What is Phylum Ctenophora? Kingdom Animalia Subkingdom Eumetazoa Phylum Ctenophora Phylum Ctenophora, commonly referred to as comb jellies, encompasses a group of marine invertebrates known for their distinctive, jelly-like appearance and unique locomotive mechanisms. These creatures, often mistaken for jellyfish, play a significant role in marine ecosystems across the globe. Below is an exploration of … Read more
What is Phylum Porifera? – Definition of Phylum Porifera Phylum Porifera refers to a group of simple, sessile aquatic animals commonly known as sponges. Sponges lack true tissues and organs and have a porous body structure with numerous channels and chambers that allow water to flow through them. They feed by filtering small particles from … Read more
Origin of Parazoa Choanoflagellate: Link to sponges Sponges’ internal chambers are bordered by a series of specialised cells known as choanocytes (choano = collar; cyte =cell). These are the cells that feed sponges. Each choanocyte, like choanoflagellates, possesses a collar of tentacles enclosing a single anterior flagellum. By undulating dozens of flagella, choanocytes generate a … Read more
Reproduction in Protista Methods of Reproduction in Protists The following paragraphs emphasise the two essential reproductive strategies of protists. The procedures are: A. Asexual Reproduction in Protists Mode of Asexual Reproduction In Protista 1. Binary Fission Mitosis is the division of the parent cell into two identical daughter cells. Examples: Amoeba, Euglena and Paramecium. 2. … Read more
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