Abby set out to determine how many genes control the length of people's pointer finger. She compared
the length of the forefinger from 12 different
people. She measured each person's finger by
placing a metric ruler next to the person's finger and
measuring the length.
What is a possible source of error in her
experiment?
O A. She did not include a control group.
O B. She may have had a difficult time making
accurate measurements directly.
O C. She did not collect data from enough
people.
O D. She may have had a difficult time making
accurate measurements by estimation.

Are salt and soap nutrients or toxins for yeast? explain.

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a. one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b. one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c. one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.