________ and ________ have led to a rise in median age in North America
Fill in the blank(s) with correct word
lower birth rates, rising life expectancy
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Which of the following is NOT needed for plant growth?
a. water b. air c. humus d. mineral matter e. All of these are needed.
Which of the following best matches the description?Process of replanting an area after the original trees are removed.
A. clear-cutting B. cover C. selective harvesting D. reforestation E. threatened species F. speciation G. patchwork clear-cutting H. mutation I. biodiversity J. species diversity K. endangered species L. extinction M. habitat management
Radioactive elements are found in materials all around us, even our bodies.
Answer the following statement true (T) or false (F)
The rise of market forces in agriculture transformed food into a ________, something to be bought and sold for a profit
Fill in the blank(s) with correct word