Eduardo is narrowing the focus of his science fair project and compiling a list of research questions his project can answer. which of the following questions can be answered scientifically? a. which brand of sugar-free popsicle melts the fastest? b. which brand of mp3 player sounds the best? c. which brand of bandage hurts more to remove? d. which brand of orange soda do people prefer?

Hemoglobin is the compound in red blood cells that carries oxygen to the body. the distribution of hemoglobin in women in g/dl of blood is approximately normally distributed with mean 14 and standard deviation 1. too little hemoglobin, and you're anemic. 2. too much, and (unless you live at high altitudes), you can have other problems.

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h,o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.