What occurs in a chemical reaction

Me with these questions if you’re it sure don’t answer

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

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome