How many chambers does the human heart have?

Which of the following would be a body response when stepping outside without a coat on a snowy day? a. senaceous glands. secrete more senum b. more liquid is transported by the body to the skin fir insulation c. blood vessels in the skin narrow and contract d. blood vessels in the skin expand

Crossing over is a method of (blank)?

The carrier molecules of the electron transport system are located in the