Protects the cell and controls what enters and leaves the cell

Which of these statements best describes the st. lawrence seaway? the st. lawrence seaway connects the st. lawrence river with the arctic ocean. the st. lawrence seaway provides an important trading route between the u.s. and mexico. the st. lawrence seaway provides an important trading route for the u.s, but has little value for canada. the st. lawrence seaway connects the great lakes, the st. lawrence river, and the atlantic ocean.

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?

Which step is not included in the step approach to calculating the greatest common divisor?