IGCSE Bio Exam Style Questions Q2

This question: "A student investigates how the type of fertiliser affects the rate of growth of a plant. Give two abiotic variables that should be controlled in this investigation."

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[whoisAPT]

What about light intensity and temperature

[sadabsadmanhaquepriom]

Does water supply, as in, the amount of water provided to the plant count?

[KalinashoJohannes]

Different between prokaryotic and eukaryotic