Different Substances Added Non-nutritive Potting Soil With Non-nutritive potting soils All substances present Nitrates Phosphates Sulfates Calcium Potassium Magnesium Iron Biomass (grams per pla V 2 сл + + 8
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- The data that is attached below was collected during a lettuce seed ecotoxicity assay. Lettuce seed assays are used to compare the ecotoxicity of methanol, ethanol, and isopropanol by these alcohols' effects on germination rate and root elongination. Using the attached data, help answer which alcohol seems to be the most toxic to lettuce seeds. Why or why not would your results be expected? What does this information tell you about using ecotoxicity data to estimate human toxicity?Differentiate the saturation concept from the limiting factor concept of plant response to the environment.Watch the suggested videos for Plants Response to Stimuli. a. GeotropismGeotropism Experiment (2:48 minutes)https://www.youtube.com/watch?v=AEo5UsPeB5gb. PhototropismPhototropism Experiment (2:16 minutes)https://www.youtube.com/watch?v=WZ1NRP3OF5w a. For each experimental set up (geotropism and phototropism), identify the dependent and independent variables that have contributed to how plants responded to the stimuli.
- Explain the concept of phototropism and how auxin is involve in this process. Give some examples.What is the evolutionary trend in the alternation of generation in plants? Further elaborate on the adaptive advantage of the trendA team of researchers investigated the effects of phosphorous availability and light intensity on an angiosperm species. Seeds of the angiosperm were divided into four equal groups. Groups 1 and 2 were exposed to 200 μmol, and Groups 3 and 4 were exposed to 500 μmol. Groups 2 and 4 also received a phosphorous (P) solution. After 20 days, all plants were weighed, and the average dry weight of each group was calculated. The results are in the table below. Group 1(200 μmol, no P) Group 2(200 μmol, + P) Group 3 (500 μmol, no P) Group 4 (500 μmol + P) Average Dry weight (g) 0.8 1.1 1.5 6.2 Describe the effects of light and phosphorous on the growth of the plants in this study. Explain how the metabolic processes associated with the plant kingdom likely influenced these results.
- The winding of grape vine tendrils around a trellis support is an example of Negative phototropism Positive thigmotropism thigmonasty Negative gravitropism A circadian rhythmFigure 4 shows an open stoma during a gaseous exchange process in a plant. Elaborate the gaseous exchange process in plants with considering the influence of Y to the turgidity of guard cells.A team of researchers investigated the effects of phosphorous availability and light intensity on an angiosperm species. Seeds of the angiosperm were divided into four equal groups. Groups 1 and 2 were exposed to 200 pmol, and Groups 3 and 4 were exposed to 500 umol. Groups 2 and 4 also received a phosphorous (P) solution. After 20 days, all plants were weighed, and the average dry weight of each group was calculated. The results are in the table below. Group 1(200 pmol, Group 2(200 umol, Group 3 (500 umol, Group 4 (500 pmol no P) no P) +P) Average Dry weight (g) Describe the effects of light and phosphorous on the growth of the plants in this study. Explain how the metabolic processes associated with the plant kingdom likely influenced these results. 10.8 1.5 6.2
- Experiment about the, "Effect of Light Stress on Germination and Growth Parameters of Corchorus olitorius, Celosia argentea, Amaranthus cruentus, Abelmoschus esculentus and Delonix regia." By Akinbode F. OLOGUNDUDU, Adekunle A. ADELUSI, and Kehinde P. ADEKOYA. What is the experiment called and what is about. Give a summary of the experiment.what could be a pontential source of error when germinated seeds are planted in a petri dish? will this affect geotropism?Compare the energy needs of a plant for the movement of water in the xylem according to the cohesion-tension model to the movement of phloem sap according to the pressure-flow model?