Experimental design A. Three 1.5 g batches of radish seeds are weighed and place

ID: 313843 • Letter: E

Question

Experimental design A. Three 1.5 g batches of radish seeds are weighed and place on a paper towel in a petri dish and exposed to the following conditions. Treatment 1. Seeds placed on DRY paper towels in LIGHT Treatment 2. Seeds placed on WET paper towels in LIGHT Treatment 3. Seeds placed on WET paper towels in DARK B. After 1 week, the plant material for each treatment was dried in an oven overnight (no water left). The weight was recorded as plant biomass (in grams). Your initial prediction. Will the biomass increase, decrease or remain the same? Why?

Explanation / Answer

Will the biomass increase, decrease or remain the same? Why?

Treatment

Prediction biomas

Reasoning

(dry/light)

Decrease in biomass

Due to conditions such as Absence of water, which is required for photosynthesis.

There will be no photosynthesis …leads to decrease in biomass.

2 (wet/light)

increase, in biomass

Presence of Water, and light

., there will be photosynthesis …leads to increase in biomass.

3 (wet/dark)

decrease in biomass

No light.

Due absence of light., there will be no photosynthesis …leads to decrease in biomass.