How many alleles are there for the four main types of human blood? one
two
three
four

In a study of a weight loss program, 40 subjects lost a mean of 3.0 lb after 12 months. does the weight loss program have practical significance? a. yes, because the weight loss program worked and the subjects lost a mean of 3.0 lb. b. no, because the mean weight loss of 3.0 lb after one year does not seem to justify the program. c. no, because the sample of 40 subjects was too small to determine if the program was useful. d. yes, because the mean weight loss of 3.0 lb after one year does seems to justify the program.

What economic effects might result from the depletion of groundwater supplies from the ogallala aquifer? need to know asap

Based on the chart, what are the three most effective methods to protect against pregnancy?