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Choose all the answers that apply.

Mutations .

are random
delete genes from the gene pool
add new genes to the gene pool
are changes in an organism's DNA
can be caused by exposure to radioactive substances

Astudy was performed on 20 trees to test the effectiveness of a new fertilizer. the results of this specific study is brought into question. what would possibly improve the reliability of the results?

Prior to the mt. st. helens eruption on may 18, 1980, satellite and topographic views of the volcano were captured. based on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m? question 9 options: 600 m 400 m 750 m 500 m

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