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1 . Carbohydrates are used for
2 . An _ element _____ is defined as a pure substance made up of one type of atoms and cannot be further subdivided into simpler substances by any physical or chemical means .
3 Orchids were studied to determine if the amount of humidity affected the flowering of these plants . Which of these was the independent variable in this study ?
4 A solution with a pH below 7 is
5 For the following statement , what is the dependent variable ?
6 Identify and briefly explain the four levels of protein structure .
7 A protein molecule which is denatured , has
8 Changing the number of neutrons of an atom changes its :
9 Which variable is measured rather than manipulated ?
10 Some insects can " walk on water " because :
11 Richard was observing black swallowtail butterflies in the field . Which one of these is an observation he made about a black swallowtail butterfly ?