How many chromosomes do you get from your parents?

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

Which chemical equation is unbalanced? which chemical equation is unbalanced

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.