Embryonic stem cells and adult stem cells. Find out about the differences between them. Diffusion is the movement of particles from high to low areas of concentration. Learn how cells use it to ...

is essential to the global carbon cycle and organisms that conduct photosynthesis represent the lowest level in most food chains (Figure 1). Most living things depend on photosynthetic cells to ...

In nature, there is an enormous diversity of lipids, with each organism ... membrane in a systematic, step-by-step way," says Justice. "By finding the minimal lipid requirements for a living cell ...