Which observation would most likely be made before an experiment? a. measuring plant growth in response to different fertilizers b. determining the mass of a product from a chemical reaction c. counting the number of seeds that germinated after soaking in water d. noticing the number of tulip plants that sprouted late in a garden

The correct answer is (d)  Noticing the number of tulip plants that sprouted late in a garden

The observation part of the experiment should be taken before, during and after the experiment to conclude the result. Noticing the number of tulip plants that sprouted late in a garden can be made before an experiment. The further experiment related to tulip will be done afterwards. Rest all the other options provided in the question are the observation made after completion of the experiment.

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

option a and d is the correct answer

i hope this u

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