Its B cuz the definition is <span>one of two or more alternative forms of a gene.
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D, they need to be able to absorb and keep water to prevent drying out
Renal medulla
The renal medulla contains the renal pyramids, where urine formation takes place. Urine passes from the renal pyramids into the renal pelvis. This funnel-shaped structure occupies the central cavity of each kidney and then narrows as it extends out to join the ureter.
Cancer cells differ from other cells because Cancer cells spread at a different rate sometimes even slower. Destroying cells in it's path.
