Explain why lightning strikes can be dangerous even when an individual is not directly struck.

Which of the following occurs after a natural or unnatural disturbance in an ecosystem

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.

How can we use spectral lines of light coming from the superclusters to identify which is receding from earth at the slowest rate.