Manual pipetting creates a musculoskeletal load on the neck shoulders and upper limbs whitch type of injuries can this lead to

This is an ap world history question. i am working on a worksheet which has a vent diagram with each circle labeled either us or byzantine economy. the middle is the similarities. can someone explain to me the similarities and especially the differences between the two?

Environmental science jobs are expected to grow by how much between now and 2016? a) 5% b) 15% c) 25% d) 100%

Which theory of color vision most accurately describes the process of color vision at the level of the retina?