Distinguishing features of organisms in the Phylum Echinodermata include a lack of body segmentation, radial symmetry and life adaptations for marine environments. The Phylum Echinodermata includes more than 6,000 different species. Most organisms in this category take the form of starfish and have endoskeletons, which appear in humans, too, and give organisms the ability to move and grow.Know More
Of all the phyla in the animal kingdom, the Phylum Echinodermata most closely resembles the Phylum Chordata, which includes humans. Echinoderms, like humans, have distinct spinal columns. They have coeloms deriving from digestive tubes, which resembles the internal digestive system of humans and many animals. Like people, organisms in the Phylum Echinodermata contain endoskeletons that form primarily from hard, dense calcium carbonate. Sharp spikes radiate out from the skeletons of echinoderms, giving them a distinct appearance.
In addition to starfish, this phylum includes other aquatic species too, such as sea cucumbers, brittle stars and sand dollars. While some, like starfish, contain projecting arms, others have a pentameral design. This design features a body symmetry of five equally sized parts. Echinoderms derive nutrients and water through a water-vascular system. This system involves a network of internal canals that breaks into smaller channels internally, culminating in tube feet. A feature unique to echinoderms is the ability to regenerate organs and limbs upon damage or loss.Learn more about Biology
The Phylum Zoomastigina contains organisms, such as trichonympha and trypanosome, which have flagellum and belong to the larger class of protozoa. This phylum includes many different organisms, but all have the distinct feature of having flagellum, which are long, whip-like extensions in their rears that look and function like tails. Organisms in this phylum are eukaryotes; they lack chloroplasts and may live in many different environments, including the surface of the Earth, below ground, in the atmosphere and in water.Full Answer >
The three subphylums in Chordata are Vertebrata, Urochordata and Cephalochordata. Vertebrata is the largest group, including such familiar animals as fish, birds, reptiles, amphibians and mammals. Urochordata contains about 4,600 to 5,100 species total, and Cephalochordata contains only 28.Full Answer >
The characteristics that all living things share are cells, growth, reproduction, adaptation, homeostasis, use of energy and response to the environment. Using these characteristics, it is easy to determine if something is living, dead or non-living.Full Answer >
Amoeba are unicellular eukaryotes with no cell wall. They reproduce using binary fission and move by the use of pseudopodia. Pseudopodia are false feet that extend out, and then the rest of the body follows. Amoeba are found in ponds, rivers and on the surface of leaves and plants.Full Answer >