echinoderms are a group of aquatic invertebrates but they are only found in salt water
Answer from: Quest
answer; i believe the answer is (polygenic inheritance;
Answer from: Quest
many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.