There are many well-known mutant forms of hemoglobin. These forms are usually named after the region where they are first identified. Hemoglobin "Philly" is a form of hemoglobin that is destabilized by having an F substitute for a Y in the -subunits. The Y normally participates in the hydrogen-bonded network that helps to knit together the 1-1 interface. Would we say that this mutation destabilizes 1o, 2o, 3o, or 4o structure? Pick one (the best answer) and explain why F causes this problem

List two limitations of natural selection

Other than earth, is also known to have magnetic pole reversal? a: venus b: mars c: earths moon d: the sun

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.