Thirty corn seedlings of equal size were randomly assigned to one of three treatment groups. At the beginning of the experiment, the plants in group I were dried and the mass was determined.

The definition of the particular situation is outlined throughout the following section of the justification.

Explanation:

The query given seems to be incomplete. Please find the full issue attachment.

(a)

CO2 provides an inorganic component containing cellular mass. Throughout the atmosphere, plant species suck up CO2. Plants manufacture sugars throughout the mechanism of photosynthesis. Sugar is turned into glucose, cellulose as well as certain carbohydrates processed in cell walls. This raises the density of the plant. The process needs water, Carbon dioxide respectively.

(b)

Sunlight is absorbed by chlorophyll as well as converted through chemical energy. The plant utilizes biochemical resources to synthesize sugars. The volume including its plant has risen due to the manufacture of sugars, respectively. For producing sugars, plants require light. The loss in mass has been caused by cellular respiration. There's this community of crops in the dark. They don't do photosynthesis, hence.Because to get power for something like the operations including its plant, individuals had to undergo respiration. So there is no photosynthesis, and therefore there is no sugar development. But instead to release energy, the sugar contained in the plant is eaten. And that's why the amount including its plants holding in darkness reduces.

There are 3 steps given below for cellular respiration:

GlycolysisKreb's Cycle Electron Chain of Transport

Cellar respiration fills certain living things with energy.  

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The generated CO2 has so far been delivered from the body including its plant. Therefore the plant mass was indeed decreased by this.

The answer is option a