How did the absent minded professor burn his ear answer key?

Absent minded means inattentive because of rationally thinking about other things what a person is actually doing. A person tends to lack attention in what they are doing. The professor probably burn his ear when he was ironing when his phone rang.

Answer : Absent minded is a state of mind where a person is not attentive to the present situation (or what is happening around) rather is lost in thinking other things in mind.

In this case when the professor was ironing his clothes, he was lost in thoughts and was absent minded while performing the task of ironing. When he got a phone call on his mobile which was besides iron, he picked up the iron and touched it near his ear; which burnt his ear as iron was steaming hot.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.