Which of the following are environmental factors that can influence whether someone develops osteoporosis? Check all that apply.
age
exercise
gender
diet
ethnicity
stress

How does the study of genetic disorders such as pku biologists understand normal alleles?

Where can dna be found in a prokaryotic cell

Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.