9. Which of the following statements describes the data in Figure 1? a. An increase in sea urchin which of the following statements describe the data in figure 1?

a. an increase in sea urchin biomass is associated with more intense grazing.

b. An increase in sea urchin biomass is associated with greater kelp density.

C. Predation of sea otters by killer whales is associated with greater kelp density.

d. Sea otter abundance was relatively stable from 1972 to 1997.

Apopulation has 1000 individuals. over a period of 1 year, 500 newindividuals are born. which equation shows how to calculate the birthrate ofthis population? a. 500 - 1000 = 0.5b. 1000 x 0.5 = 500c. 1000 - 500 = 2d. 1000 + 500 = 1500

Which best describes what you will do in the reaching your academic potential course?

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a. one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b. one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c. one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.