Jenny underwent a surgical procedure during the twentieth week of her pregnancy in which the doctors inserted a needle into her amniotic sac through her abdomen and withdrew some fluid. the fluid was then studied for any abnormalities such as signs of down syndrome and spina bifida. in this scenario, jenny underwent a procedure known as

Which of these organisms have the greatest amount of cell specialized

Long term exposure to waves can cause sunburns and skin cancer.

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.