<span>The
answer is facilitated diffusion. It requires no energy because the ions are
traveling down the concentration
gradient. Facilitated diffusion is important
for the regulation of ions in a cell. It also enables
ions to pass across the hydrophobic layer of the cell membrane composed
of phospholipids.</span>
No image is attach which means there is no model to be referenced from
These lines (there is four of them) are residuals of the fusion of the five sacrum vertebrae that are fused. These "vertebrae" or segments present a characteristics, being the first of them very similar to a lumbar vertebra, large, and the other vertebrae are<span> progressively smaller and flattened. They also present a curved shape being anteriorly concave.</span>
I am going to go with either C,A B.
I'm not entirely sure. it's just what i think
Cancer cells are insensitive to growth, they stimulate their own. They also resist inhibitory signals. They also deactivate cells and genes usually causing these opposing cells to die. <span />
