Use the graph to answer questions 1 and 2. 1. The units of the dependent variable are O   a. mL/min O   b. mL/sec O   c. minutes O   d. seconds 2. According to the graph, addition of the anzyme Amylase causes the reaction to O   a. slow down O   b. speed up O   c. give off heat O   d. take in heat

3. This table suggests that the processes of photosynthesis and respiration can be thought of as a cycle because O   a. one is used only by plants and the other is used only by animals O   b. both give off oxygen to be used by animals O   c. the products of one are used as the raw materials of the other O   d. they both have the same purpose

4. The hypothesis best supported by this graph is that these beetles are most active when the area is O   a. free from predators O   b. coolest with some sunlight O   c. wettest from dew O   d. richest in oxygen supplies

5. According to this chart, the insects that are most closely related are the O   a. springtails and bristletails O   b. dragonflies and proturans O   c. springtails and proturans O   d. bristletails and mayflies

6. In pea plants, tall plants are dominant to short plants. If two heterozygous tall plants are crossed, what percent of the offspring will probably be short? O   a. 75% O   b. 50% O   c. 25% O   d. 0%

7. The data table shows the growth of two bean plants over several weeks using four different fertilizers. The experimental data would be more valid if which of the following variables was included in the experiment? O   a. a fifth fertilizer was tested O   b. only one plant was tested O   c. the plants were grown at variable temperatures O   d. a control without fertilizer was included for each plant