Which idea explains darwin’s observations about galapagos islands finches?

The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

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

Match each term to its best definition? sedimentary depositional enviornment