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Across
2.The rate, or speed, at which the number of organisms in a population increases.
5.The practice of controlling the number of children in a family and the intervals between their birth
6.a species whose numbers are so small that the species is at risk of extinction
Down
1.A bar graph of a frequency distribution in which the widths of the bars are proportional to the classes into which the variable has been divided and the heights of the bars are proportional to the class frequencies.
3.Growth whose rate becomes ever more rapid in proportion to the growing total number or size.
4.any species, including its seeds, eggs, spores, or other biological material capable of propagating that species, that is not native to that ecosystem; and whose introduction does or is likely to cause economic or environmental harm or harm to human health.

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