The diagram shows the embryological development of a fish, salamander, turtle, and chick. The top of the diagram shows the early embryos of each organism. The bottom of the diagram shows the embryos later in development. What similarities exist between the early embryos of all four organisms? What do these similarities indicate about the organisms?

If the element whose electric configuration ends in the d sublevel, the element is calssified as? a.inner transition b.noble gases c.representative d. transition

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.