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

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d

answer: 20 percent

the fish culture has become a developing commercial practice in developing countries which is already prominent in developed countries of the world. the major fish protein demand is being supplemented in developing countries is   fishing to meet the needs of the growing population. therefore, in some developing nations, the percentage of animal protein from fish in the diet can be as high as 20 percent.