The hox6 paralogs begin to be expressed in somites just posterior to the boundary between the somites that give rise to cervical (neck) and thoracic (rib forming) vertebrae. expression of hox6 paralogs extends into the somites that give rise to the lumbar vertebrae. if all three paralogs of hox6 are mutated, which change would you expect:

the answer to your question is b

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.