Starfish have lost two of its arms by what process cut a regenerate them

Based on anatomical similarities, to which modern animal is dr. digger’s creature most closely related?

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi, r^3 , where r is the sphere’s radius.

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist