Which phyla are classified in the Deuterostomia?
The phyla classified in the Deuterostomia are:
1. Chordata: This phylum includes animals with a notochord (flexible rod-like structure), dorsal nerve cord, and post- tail. Examples include fish, amphibians, reptiles, birds, and mammals.
2. Echinodermata: This phylum includes animals with a spiny radial symmetry and water vascular system. Examples include starfish, sea urchins, and sea cucumbers.
3. Hemichordata: This phylum includes marine organisms that have both characteristics of chordates and invertebrates. Examples include acorn worms.
These three phyla make up the Deuterostomia, characterized by a particular sequence of embryonic development known as deuterostomy, where the first opening formed during gastrulation becomes the anus.
The phyla classified within the Deuterostomia include:
1. Chordata: This phylum includes animals that possess a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post- tail. It comprises diverse organisms such as fishes, amphibians, reptiles, birds, and mammals.
2. Echinodermata: This phylum consists of marine organisms characterized by their spiny skin and a water vascular system. Examples of echinoderms include starfish, sea urchins, and sea cucumbers.
3. Hemichordata: This phylum includes marine worms that possess a body divided into three parts: proboscis, collar, and trunk. Examples of hemichordates include acorn worms and graptolites.
It is important to note that these phyla are grouped together based on their embryological development, specifically the formation of the mouth and anus during embryogenesis.
The phyla classified in Deuterostomia include Echinodermata and Chordata.
To find the answer to this question, you can use a few different methods:
1. Textbooks or class materials: Check biology textbooks or class materials that cover the classification of animals. Look for sections that discuss the major phyla and their characteristics.
2. Online resources: Use reputable online sources such as educational websites, scientific encyclopedias, or university websites that specialize in biology or zoology. Look for resources that provide information on animal classification or phyla.
3. Biological databases: Explore online biological databases that store information about different species. These databases often include classification information for various organisms, including phyla. You can use search filters or browse through the taxonomic hierarchy of animals to find the Deuterostomia phyla.
Remember, it's important to cross-reference the information you find from multiple sources to ensure accuracy and reliability.