What holds the sides of the dna ladder together?

What is the function of the somatic nervous system? connects the brain and the spinal cord to the rest of the body carry signals to the muscles and glands includes all nerves controlling the muscular system and external sensory receptors controls internal organs like the heart and bladder

Climates are classified according to which two major factors: a. elevation and precipitation. b. latitude and temperature. c. elevation and latitude. d. precipitation and temperature.

Which pair of organizations is most closely related to primates?