Cnidaria comes from the Greek word cnidos, which means stinging thread. The existence of cnidae characterises these creatures. Cnidaria is a phylum within the Kingdom Animalia that contains 10,000 known species, including corals, sea anemones, jellyfishes, and hydras. These organisms are found in both marine and freshwater environments. It is an additional ancient group with … Read more
Sea fur is an alternative term for Obelia. Obelia has a delicate, semitransparent, pale to light-brown hydroid colony. It consists of stems with vertical branches called hydrocauli and root-like branches called hydrorhiza. In order to complete its life cycle, Obelia’s asexual and sexual generations alternate. The life cycle of Obelia regularly alternates between hydroid and … Read more
What is Protista? – Protista Definition Different Locomotion organs of Protista Protists are a heterogeneous group of unicellular eukaryotic creatures with a vast array of movement techniques. Certain protists utilise flagella, cilia, or pseudopodia for locomotion. 1. Flagella Some protists have long, whip-like appendages called flagella that protrude from their surface. They are utilised for … Read more
What is Polymorphism in cnidarians? The majority of polyps are sessile, whereas meduase types are motile. Nonetheless, there is a similarity between the two in their fundamental characteristics. Importance of Polymorphism Polymorphism is fundamentally a phenomena of labour division. Rather than assigning diverse functions to the components or organs of a single individual, distinct functions … Read more
Protists are a varied category of eukaryotic creatures that are unicellular or multicellular, and can be free-living or parasitic. They have a simple cellular structure, with a nucleus and other membrane-bound organelles, and are capable of a wide variety of metabolic operations, including as photosynthesis, digesting, and locomotion. Protists are found in nearly all habitats … Read more
What is Canal system in sponges? Canal system in sponges is a system of water canals present in the body of sponges through which water circulates continuously. It is also referred to as aquiferous system. This system is highly characteristic feature of phylum Porifera and it is essential for their survival. Sponges are sedentary and … Read more
