33. crystal thinks that plants grow better with light than in the dark. to test this hypothesis,
she performed an experiment with the following steps:
• plant five radish seeds in one cup of soil and five carrot seeds in another cup of soil.
• give both cups the same amount of water.
. place the radish seeds under a lamp, and water them every day.
• place the carrot seeds in a dark closet, and water them every day
crystal changed more than one variable in her experiment. which of these changes should
crystal make so that her data are in answering her hypothesis?
a. use only one type of seed
c. place both cups in the closet
b. place all the seeds in one cup
d. use two different types of soil

Structures in cells that carry out specific functions.

Where does all the water go? according to the environmental protection agency (epa), in a typical wetland environment, 39% of the water is outflow; 46% is seepage; 7% evaporates; and 8% remains as water volume in the ecosystem (reference: united states environmental protection agency case studies report 832-r-93-005). chloride compounds as residuals from residential areas are a problem for wetlands. suppose that in a particular wetland environment the following concentrations (mg/l) of chloride compounds were found: outflow, 60.4; seepage, 73.7; remaining due to evaporation, 26.4; in the water volume, 46.8. (a) compute the weighted average of chlorine compound concentration (mg/l) for this ecological system. (round your answer to one decimal place.) mg/l (b) suppose the epa has established an average chlorine compound concentration target of no more than 58 mg/l. does this wetlands system meet the target standard for chlorine compound concentration? yes. the average chlorine compound concentration (mg/l) is too high. yes. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is too high.

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.