👉 Echinoderidae are a group of marine invertebrates, including the sea urchins and clams. They belong to the family Echinodermata and are characterized by their hard exoskeletons made of plates or shells, which are covered with a tough outer layer of keratinized cells called the epidermis. The eukaryotic cells in these shells have a single cell nucleus surrounded by a central vacuole.
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What is the definition of Echinoderidae? 🙋
👉 Echinoderms are a group of animals that include jellyfish, scallops, crabs, and many other types of cephalopods. They have a bony shell made up of plates arranged in a spiral pattern, enabling them to float on water. Echinoderms are also known for their ability to change color due to pigments derived from the shells.
