Un microscopio electrónico funciona de manera similar a: microscopio de luz
láser
televisión
horno tostador

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

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

Due tonight 10 points will mark brain