What does external stimulus mean? ?

List two modern organisms that have pentameral symmetry

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

Will mark brainliest. (20 points) many have pigments structures known as eyespots that detect direction of light. a. b. archaebacteria c. protists d. none of the above