Each of the following is a contribution of the Shang Dynasty except... a
a calendar based on the sun and moon

b
a picture-based writing system

c
decorative bronze vessels

d
fine gold jewelry

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

Which statement is true for bacteria a. bacteria have complex internal structures b. all bacteria are spiral in shape c. all bacteria cause disease in animals d. bacteria break down some foods

Which process is represented a.) deletion b.) nondisjunction c.) translocation d.) insertion