Question

HELP ASAP! 20 POINTS!

In an experiment to test the hypothesis that added phosphate will cause marigolds to produce more blooms, the experiments has two groups of pots planted with marigold seeds. One group gets watered with no phosphate. Both groups get the same amount of water and light.
Which is a controlled variable in this experiment?
A) numbers of pots
B) amount of water
C) amount of phosphate
D) amount of blooms on a plant

Answer 1

C. Amount of phosphate

hoped this helped!

Answer 2

. Amount of phosphate C. is the answer hope that helps

Malory or Mal answered this