What characteristics do scientists use to distinguish between organisms in different kingdoms?

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

Why do mutations in genes affect traits? o a. genes determine what type of mutagens an organism has. o b. genes produce proteins that cause traits. o c. genes affect how many chromosomes an organism has o d. genes code for carbohydrates that influence traits.

What occupation did muhammad have before the first revelation