Question

a student is designing an experiment about cell size in organisms of different sizes. her hypothesis is that larger organisms will have larger cells. she collects cheek cells from five different students in her class and estimates their size under the microscope. her results can be seen below.

student	height (in cm)	cheek cell size (in μm)
b	172	82
c	190	97
d	158	98
e	179	88

what is the independent variable in her experiment?
multiple choice
size of cheek cells
different types of organisms
micrometers (μm)
height of human students

Explanation:

The independent variable is what is changed or controlled in an experiment. Here, the student is testing if organism size (represented by human student height) affects cell size, making height the independent variable.

Answer:

D. height of human students