9. Vaccines have contributed to human population growth by lowering the death rate.
c. increasing the birthrate.
b. increasing the death rate.
d. lowering the birthrate.
a.
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The diagram illustrates the activity of vesicles during a cellular process.

Which best describes meiosis? a. it produces cells that are identical to the original cell b. it is responsible for the replacement of damaged skin cells c. it is responsible for growth of the organism d. it produces male and female sex cells

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?