The length and breadth of rectangular field are 6 3by 4 m and 4 1 by 3 respectively. find its area

Sea stars, sea urchins, sand dollars, and brittle stars are all memeber of a group, what is the common name of the group they are all in

All organisms contribute some water to the water cycle by conducting

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.