Why are limbs of different vertebrate species, with completely different functions, made up of the same bones?

Ithink most frequently occurring lab-acquired infection. proper way to clean up a small blood spill that has dried on surface are to be used when caring for all patients at all times. which of the following actions would violate a lab safety rule.

if you solve this you will know the answer

The one that would be the most effective means of controlling current water pollution of us surface water is : shutting down factories that discharge materials to the rivers.the largest sum of us pollution currently caused by factory-related substance

All of the answer above are correct hurricanes do all of negative affects above