Answer:
Echinoderms have a calcium carbonate endoskeleton, and vertebrates have a bony endoskeleton made of calcium phosphate. have bones mostly made of calcium phosphate.
Explanation:therefore, echinoderms do not have true endoskeletons.
Answer:
What is the difference between microevolution and macroevolution? Microevolution deals with changes in the gene pool of a single population. Macroevolution considers the broad pattern of evolutionary change over long periods of time and includes the origin of new groups.
Primary succession is ecological succession that begins in essentially lifeless areas, such as regions in which there is no soil or where the soil is incapable of sustaining life (because of recent lava flows, newly formed sand dunes, or rocks left from a retreating glacier).
It was proven that smoking increases your risk of cancer.
rain or thunderstorms
typically thunderclouds and storms are the post affect of a cold front, causing D to be your answer, MrKnowledge
