Why standard units neeeded

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

How would you describe the the organisms in the second row of model 1 that are connected to the parents by a line

Biology ! the conversion of inorganic carbon to organic carbon by plants during photosynthesis is known as _[blank]_. filtration immigration reabsorption primary production