What is the difference between saving an Excel file in .xlsx and in .csv? Would it be better to import into R using .xlsx or .csv?
The phylum Echinodermata, which contains about 6000 species, gets its name from the Greek, literally meaning âspiny skin.â This phylum exists exclusively in the sea and includes sea stars, urchins, brittle stars, and sea cucumbers. They are simple animals, lacking a brain and complex sensing organs.
Name: Echinoderm True/False Indicate whether the sentence or statement is true or false. TF 1. Chordates and echinoderms have a common ancestor. TF 2. None of the echinoderms living in the oceans today is sessile. TF 3. In addition to radial symmetry, echinoderms have a water-vascular system. TF 4. â¦ Continue reading Echinoderm