The graph shows the populations of two species over time. Which type of symbiotic relationship does the graph represent? A. Commensal

B. Mutualistic

C. Parasitic

D. Parent-offspring

E. Predator-prey

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

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.

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