In an experiment I have two groups of flowers, A and B. As a curious scientist I wanted to test the effects of fertilizer on plant growth. Group A was not given any fertilizer, while Group B was given fertilizer. I left all other conditions the same within each group such as amount of water, type of flower, and amount of sunlight. After three weeks of running this experiment I measured the height of each plant. My conclusion was that Group B flowers were taller than Group A flowers. After reading this scenario what is the independent variable?

Independent variable: FERTILIZER

Explanation:

The independent variable in an experiment is the variable that is changed or manipulated by the experimenter in order to bring about a measurable response.

In this experiment, the effects of fertilizer on plant growth is tested. Two groups: Group A and B were used. Group A was not given any fertilizer, while Group B was given fertilizer. This portrays that the experimenter is manipulating the FERTILIZER. Hence, the FERTILIZER is the independent variable.

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure