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1. How do you determine that an element is essential for plant?
2. How does an ion move from an external solution into xylem in plant roots?
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Solved in 3 steps
- For an element to be regarded as essential, all of the following criteria must be met, except: No other element can perform the function The element is directly involved in plant nutrition The element is inorganic The plant cannot complete its lifecycle without the element.1. Estimate the maximum turgor pressures (Ψp) inside the cells of leaves and flowers. 2. Which structure (leaves or flowers) have stiffer, more rigid cell walls? What part(s) of the graphs tell you this? 3. At about what relative cell volume (equal to relative water content) does incipient plasmolysis occur for each structure? 4. Which structure (leaves or flowers) has more solutes inside the cells? 5. Which structure (leaves or flowers) do you expect to undergo more shrinking and swelling in volume with changes in water content? 6. Imagine you wanted to display a C. speciosa shoot in a vase in your house. You cut a flowering shoot (a shoot with both leaves and flowers on it) from a tree growing outside. You then transport the shoot into your house. As you carry it, the leaves and flowers are evaporating water. By the time you place the shoot in the vase of water, the relative water content (equivalent to relative cell volume) of the leaves and flowers has declined to…30. Living material (like plant roots) consist of many kinds of chemicals dissolved in water. Suppose the water concentration within the root cells is 90% explain why water in the soil (nearly pure water) tends to move into plant roots rather than out of them
- 1. Why do some water insects able to walk on water? Explain. 2. Explain how adhesion and cohesion help plants move materials. 3. What property is responsible when water get to the leaves in the top of the tallest trees against the force of gravity? Explain.1. What is the property of water that help in transport of water against gravity from the roots in plant? Cohesion alone B. Adhesion alone C. Specific heat D. Adhesion and cohesion E. Water expansion 2 Which of the following molecules contain beta glycosidic linkage?DRAW IT Draw a simple sketch of cation exchange, showinga root hair, a soil particle with anions, and a hydrogen iondisplacing a mineral cation.
- 15. What process is responsible for the increase in the total negative charge as soil pH increases? A. Dehydration reaction B. Deprotonation C. Protonation D. H+ bond formation10. What soil chemical phenomenon is described as the process of exchanging of ions from the exchange sites to those in the soil solution or those from another exchange sites? A. Cation exchange B. Ion exchange C. Ion exchange capacity D. Anion exchange1. Where does the SOLID mass of plant come from? 2. Describe why it is fair to say that : “Plants do not grow from the soil, they are made of air.”
- 27. Why does a strong salt solution kill most plants?Which of the following is considered as an appropriate plant extraction technique? 1. Thermolabile components of plants are best extracted by reflux2. Concentration and drying of extracts in vacuo are necessary to ensure the stability of components3. Polar bioactive components should be extracted from the plan matrix using petroleum ether4. Extraction should always utilize an equal solvent-sample ratio regardless of the absorbing nature of the solvent matrix!1.what molecule beside carbohydrates do plants need to grow? what are they? where do they come from?