9) where do the microtubules of the spindle originate during mitosis in both plant and animal cells? ; a) centromere; b) centrosome; c) centriole; d) chromatid; e) kinetochore

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

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -

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.