The ocean floor - A: is always a flat bed of sand
B: has mountains, plains, and ridges like land surfaces
C: is covered by the same amount of water everywhere
D: covers less area than the land

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

sex cells are usually half's then they find another half and make a fertilize egg

a compound light microscope is used to magnify objects in steps.  

hope it

label a.   prophase

label b. metaphase

label c: anaphase

label d: telophase