Which of the following elements could replace iron in a compound? a) ag, b) ca, c) cu, or d) sn?

Explain why scientists use shared characteristics to make cladograms.

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum

Draw the lewis dot structure for each of the following polyatomic ions