their body plan
None of the above. Echinoderm refers to a member of the animal phyla Echinodermata, the sister taxon to our own phyla, Chordata.
All mollusks possess a soft body covered by a hard shell, a muscular foot for movement, and a mantle that secretes the shell. These characteristics distinguish mollusks from other phyla in the animal kingdom.
Sea StarsJellyfishSponges
tabulate the distinct characteristic of the different phyla of algae
Phyla: Echinoderms Class: -Asteroidea - Sea stars -Ophiuroidea - Brittle stars -Holothoridea- Sea cucumbers
Biologists use characteristics such as body symmetry, presence of tissues, body cavity structure, and digestive system type to classify animal phyla. Other features like presence of a backbone, mode of reproduction, and presence of specific body structures are also taken into account for classification. These characteristics help scientists group animals into different phyla based on shared evolutionary traits.
Animals belonging to the same phyla share similar body plans and characteristics. For example, animals in the phyla Chordata, which includes vertebrates like mammals, birds, fish, and amphibians, share a notochord and dorsal nerve cord during their development.
Not all animal phyla possess a backbone or true tissues. Additionally, not all animal phyla exhibit bilateral symmetry or segmentation. Some phyla, like sponges, lack specialized organ systems, while others, like cnidarians, have a simple nerve net instead of a centralized nervous system.
The presence of a notochord at some point in the organism's development is one of the characteristics that distinguishes chordates from other phyla. Without it, I'm not sure if the organism would be considered a chordate.
There are more than two phyla in the animal kingdom... There are many phyla in the animal kingdom. There are a few phyla of worms and other invertebrates and then you have the vertebrate ohyla. Unless that's what your asking? Did you want the invertebrate and vertebrate in general phyla? That's the only set of 2 things I can think of.
Two other phyla that a mouse belongs to are Chordata (which includes all vertebrates) and Arthropoda (which includes insects and spiders).
this is stupid