Biology, 10.07.2019 12:10 20heldmadison

Achemist is studying the effects of minerals on plant growth. she knows that phosphorus stimulates plant growth. she decides to test the effects of various phosphorus concentrations on plants every 5 days over a 20 day period. what is the independent variable in this experiment a. amount of plant growth b. phosphorus concentration c. time of experiment d. types of plants

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Achemist is studying the effects of minerals on plant growth. she knows that phosphorus stimulates p...