Active transport uses up energy while passive transport does not.
Answer:
It began after the stock market crash of October 1929, which sent Wall Street into a panic and wiped out millions of investors. Over the next several years, consumer spending and investment dropped, causing steep declines in industrial output and employment as failing companies laid off workers
Topography is the rise and fall of the land (AKA B)
Cells are not simple structures at all. They have numerous organelles and serve numerous functions working together with millions of other cells. They are highly complex machines on their own that are combined with other highly complex machines to build anything, from smallest to largest organisms. For some unicellular ones they even do other things that cells in multicellular organisms don't.
No because there are different types of cells and they have different processes.