Describe one observation that supports the theory that mitochondria and chloroplasts originated as independent prokaryotic organisms

check for the pregnancy rating of drug. if its class c or d see if other alternatives

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.