Calculate the average number of red blood cells for every 100 white blood cells in the human body.

What two temperature scales do scientists use

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons

10. in which phase will crossing-over occur? a. mitosis b. metaphase ii c. prophase i d. meiosis ii