Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
The artificial manipulation, modification, and recombination of DNA or other nucleic acid molecules in order to modify an organism or population of organisms.(7,11)
3.
To become extict (3, 3)
5.
A warming of the Earth's surface and lower atmosphere that tends to intensify with an increase in atmospheric carbon dioxide.(10,6)
7.
Acid precipitation (4, 4)
8.
The totality or patterns of relation between organisms and their environment.(7)
10.
Coal, oil or natural gas. (6, 5)
12.
The place or environment where a plant or animal naturally or normally lives and grows. (7)
13.
Living things and esp. mammals, birds and fishes that are neither human nor domesticated.(8)
Down:
2.
A species whose continued existence is threatened. (10, 79
4.
Potential increase in average global atmospheric temperatures resulting from the greenhouse effect (6,7)
6.
The condition or fact of being extinguished. (10)
9.
An atmospheric layer which blocks most solar ultraviolet radiation from entry into the lower atmosphere (5,5)
11.
unwanted by-products of a manufacturing process, chemical laboratory,or nuclear reactor.