安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- Echinoderm - Wikipedia
The first definitive echinoderms appeared near the start of the Cambrian Echinoderms are important both ecologically and geologically Ecologically, there are few other groupings so abundant in the deep sea, as well as shallower oceans
- Definition, Characteristics, Species, Facts - Britannica
Echinoderm, any of a variety of invertebrate marine animals belonging to the phylum Echinodermata, characterized by a hard, spiny covering or skin Living species include sea lilies, sea urchins, sea cucumbers, starfishes, basket stars, and sea daisies Learn more about echinoderms
- Echinoderms - Definition, Examples, Characteristics, and Habitat
Echinoderms are spiny-skinned invertebrates of the phylum Echinodermata, specifically recognized by the pentamerous body (five-pointed) symmetry in adults The phylum derives its name from the Greek words ‘ekhînos,’ meaning ‘ hedgehog,’ and ‘dérma,’ meaning skin
- Echinoderms: Sea Stars, Urchins, Sand Dollars, and Relatives . . .
Echinoderms possess an unusual suite of appendages on their skeletons, which are used for movement, interaction, and defense In addition to spines, urchins and sea stars both possess pedicellariae (singular pedicellaria) which are jaw-like structures often at the end of stalks
- Echinoderms Examples: Types Of Echinoderms From Around The World
Echinoderms are a group of animals that include starfish, sea urchins, sea cucumbers, brittle stars, sea lilies and feather stars On this page is a complete guide to echinoderms, with examples of different types of echinoderms from around the world
- Echinoderms and Chordates – Introductory Biology: Evolutionary and . . .
Perhaps the best-known echinoderms are members of the class Asteroidea, or sea stars They come in a large variety of shapes, colors, and sizes, with more than 1,800 species known
- Echinoderms - Definition, Characteristics, Types and Examples
Echinoderms are a diverse group of invertebrate marine animals that include starfish, sea urchins, sand dollars, sea cucumbers, and crinoids The phylum contains about 7,000 living species, making it the second-largest grouping of deuterostomes, after the chordates
- 28. 7 Phylum Echinodermata – General Biology
Echinodermata are named after their “ prickly skin ” (from the Greek “echinos” meaning “prickly” and “dermos” meaning “skin”) This phylum is a collection of about 7,000 described living species of exclusively marine, bottom-dwelling organisms
|
|
|