Phylum Echinodermata The phylum Echinodermata constitutes the largest group of exclusively marine organisms. This may include morphologically diverse species like sea stars, brittle stars, sea biscuits, sea cucumbers, crinoids, sea urchins etc. These animals are unisexual with no sexual dimorphism. Mostly animals belonging to every class of phylum Echinodermata are … [Read more...] about Larval Forms of Echinodermata
Characteristics of Living Things
Biology is the division of science that deals with life and living. And, in order to learn biology, one should know everything about life. But have you ever wondered what exactly life is? How can we say that something or someone is living? Why do biologists consider some things to be living and others not? Which criteria can define life? As simple and silly as these … [Read more...] about Characteristics of Living Things
Water Vascular System in Echinoderms
The phylum Echinodermata is unique in itself with its fascinating colours, structures and shapes. They are a group of marine invertebrates, with a famous and widely recognised fellow, the “Star Fish”. These marine organisms are characterised by their unique features. One of the distinctive features is the presence of spines all over the skin, just like in Porcupine. For this … [Read more...] about Water Vascular System in Echinoderms
Do Jellyfish have Brain?
What is Jellyfish? The Jellyfish, also known as ‘Sea Jellies’, are beautiful organisms with fascinating colours, structures, and shapes. They are soft-bodied bizarre blobs which keep drifting eerily in the waters. The anatomy of Jellyfish is quite simple, yet they are one of the most interesting, intimidating and intriguing marine life creatures. As beautiful as the … [Read more...] about Do Jellyfish have Brain?
Factors Affecting Blood Pressure
You may have remarked that your heart comes to your mouth while entering the examination hall. Does that actually mean your heart leaves its place and reaches for your mouth? No, it doesn't. It's an expression that we use when we can literally feel and hear the blood pounding in our ears. Similar to this, many people experience fainting spells when they see blood; does this … [Read more...] about Factors Affecting Blood Pressure