The lengths of a sample of tiger canines were measured. 68% of the lengths fell within a range between 15 mm and 45 mm. the mean was 30 mm. what is the standard deviation of this sample?
a. 5 mm
b. 15 mm
c. 7.5 mm
d. 30 mm

Which of the following is a common danger of commercial fishing?

The transport tubes for food coming down the plants are called?

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim