2points
to test a new drug that has the potential of curing people of the common
cold, a company asked human volunteers who were coughing and sneezing
to participate in a clinical study. the objective of the experiment was to test
whether the new drug could cure the volunteers in the experimental group of
the common cold. but instead of two groups, these volunteers were randomly
divided into three groups and treated as follows:
group
experimental
group
control
group #1
control
group #2
no
yes
no
new drug
orange juice
bed rest
no
yes
yes
yes
yes
yes
which of the following is the best explanation of why a second control group
was included in this experiment?

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.

Select the word from the list that best fits the definition a system made of 25 satellites

Which of the following is a true statement? question 8 options: populations can't evolve, only individual organisms. individuals have adaptations that can change over time. individuals have traits that may or may not make them successful at reproduction. individuals evolve to have adaptations.