What is one example of a response?
water lost from the lungs during breathing
ivy growing around the pole of a fence
the angle of the sun changing during the day
outside temperature dropping at night

Which of the following is the best definition of a eukaryota? a. a one-celled organism that does not have a membrane-bound nucleus b. a one-celled organism that does not have a cell wall c. an organism whose cells each contain a membrane-bound nucleus d. an organism whose cells each have a cell wall