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A group of high school students came up with an experimental design to measure which type of paper towel is the strongest.  They purchased a store brand paper towel and a name brand paper towel.   They labeled the store brand as “Paper Towel A”, and the name brand as “Paper Towel B”.   They also purchased distilled water to use in their experiment.  While in the lab, they placed 1000 mL  of distilled water in two graduated cylinders, and labeled them “Cylinder A” and “Cylinder B” to coincide with the paper towel labels.  One sheet of each type of towel was placed over separate  empty 500 mL beakers  and secured with Staples #19 rubber bands.    They slowly added single drops of water from cylinder A onto paper towel A until the paper towel was torn.  They then placed the remaining water left in the dropper back into the prospective cylinder A and measured the amount of water still remaining in the cylinder.  The same was done with paper towel B and cylinder B.  Their conclusion was that the  store brand paper towel is stronger, because cylinder A contained the most  amount of water.  Which of the following is the DEPENDENT variable in this experiment?

Figure A:  (common mushroom) Figure B: (sweet briar ) Figure C:  (Paramecium)   Figure D:  (Common Fern)   Figure E:  (English Oak)   Use the following dichotomous key to identify the scientific name of the organisms listed above. (Note:  It was not possible to italicize the scientific name in the answer list.  Sorry!)   DICHOTOMOS KEY 1a  Organism has leaves ………. go to step 2 1b  Organism does not have leaves ………. go to step 4 2a  Organism produces flowers ……….Rosa rubiginosa 2b  Organism does not produce flowers ………. go to step 3 3a  Organism produces acorns ……….Quercus robur 3b  Organism does not produce acorns ……….Nephrolepis exaltata 4a  Organism is single celled ……….Paramecium caudatum  4b  Organism is multicellular ……….Agaricus bisporus  

For Question 9, whose gas law does this pertain to?

Measuring oxygen uptake correlates _______________ (directly, indirectly) with energy creation and use.    Therefore, the higher the metabolic rate the ___________ (higher, lower) the oxygen uptake.

Which of the following would be found in equal concentration in a DNA molecule?

Genetic instruction is copied from the DNA inside the nucleus and carried to the ___________ by messenger RNA in eukaryotic cells.

What keeps your undigested food from leaking out into the abdominal cavity?

Choose the pair of pyrimidines from the list.

Which of the following cellular junctions is similar to welding two pieces of metal together?

Escoge la respuesta correcta.  Para los ítems 1-5, escoge el significado de la palabra en negrita. (repique) El repique asustaba a las aves en el campanario. [1] (briznas) El viento hace volar las briznas de hierba. [2] (a cuestas) El campesino lleva a cuestas los productos que venderá en el mercado.  [3] (brotan) Las flores de mi jardín brotan todas las primaveras. [4]  (desenfrenadas) Las ovejas corrían desenfrenadas por el campo. [5]  En el poema “La canción del bongó”, ¿qué trata de decir el poeta? [6]  ¿Qué tema tienen en común los poemas de Guillén, Palés Matos y Ureña? [7]   Identifica el ejemplo de sentido figurado. [8]   ¿A qué sentido apela el siguiente verso: y el eco suena del tamboril? [9]   En el poema “El apellido”, ¿qué es un enigma para el poeta? [10]