To maintain homeostasis, cells in the human body need to be maintained
between which two values on the pH
scale?
A. between 3.5 and 4.5
B. between 2 and 5
C. between 6.5 and 7.5
D. between 11.5 and 12.5

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

Introducing minvasive species to an ecosystem results in an increase in biodiversity is it true or false

Which of the following is not a technology that can be used to conserve resources? a. hydropower b. volcanic power c. natural gas d. geothermal select the best answer from the choices provided a b c d