If cpr is not performed, how many minutes will elapse before the brain becomes damaged from lack of oxygen?

a. 1
b. 2
c. 4
d. 10

Nucleic acid certain protein cell membranes certain carbohydrates

Which of the following best describes the relationship between glucose and complex molecules such as hormones?

Why is earth's outer core hotter than earth’s oceanic crust? earth’s oceanic crust is denser than earth’s outer core is. earth’s oceanic crust has lava flowing from the mantle. earth’s outer core has a composition of solid iron and nickel. earth’s outer core is deeper within earth than oceanic crust is.