Which statement BEST describes the organization of the periodic table of the elements? A. All gases are grouped together.
B. Gases easily form compounds with other elements.
C. Elements within a group have similar properties.
D. Elements within a period have the same number of electrons.

Cell specialization occurs by the process ofa. reproductionb. differentiationc. maturationd. growth

Why is excretion necessary to maintain homeostasis?

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. label the following topographic map. click on a label below the map to select it, and then click on the appropriate box on the map to place the label. (increments for contour lines is 50 ft).