Did earthquakes cause Pangea to break apart?

What major structure can be used to tell apart the embryos of acoelomates pseudocoelomates and coelomates?

Which is not a type of symmetry? a. asymmetryb. radial symmetryc. bilateral symmetryd. lateral symmetry

Which force diagram accurately represents a satellite in orbit around earth? image for option 1 image for option 2 image for option 3 image for option 4