A biologist wants to know how the absence of a certain mineral nutrient will affect the bone growth of a laboratory rat. The biologist performs the following four experiments. Experiment 1: Feeds the rat 100 mg of the nutrient a day, and measures bone growth over 30 days. Experiment 2: Feeds the rat 50 mg of the nutrient a day, and measures bone growth over 30 days. Experiment 3: Feeds the rat 25 mg of the nutrient a day, and measures bone growth over 30 days. Experiment 4: Feeds the rat 0 mg of the nutrient a day, and measures bone growth over 30 days. Which is the control experiment? A. E1
B. E2
C. E3
D. E4

E= Expirement

What must happen before a body cell can begin mitotic cell division

Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3co→2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4→6co2+2mno2+2kcl+4h2o enter the elemental symbol. view available hint(s) is reduced

Which of these conditions most likely produces an unstable isotope?