(1)which of the following organelles is the control center of a cell?
a. mitochondrion
b. ribosome
c. nucleus
d. chloroplasts?

(2) the invention of the microscope made it possible to discover what?

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

How have the greenhouse gasses increased from the year 2000 to 2018

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.