Need asap ! emergency! which of these is a characteristic of index fossils? a- found in the topmost rock layer b- found in many layers of the same rock c- have already established relative age d- are limited to a particular geological location

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?