(select all that apply.) examples of potential energy are a(n) 1.stretched rubber band 2.boulder perched on the edge of a cliff 3.compressed spring 4.car coming to a stop 5.elevator descending from the second floor to the first

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.

Which organisms have pharyngeal arches that develop from all three germ layers and go through the same development stages as embryos? 1.bird 2.ladybug 3.starfish 4.snake

During convection, less dense fluid rises and denser fluid sinks.