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In a plant the pressure flow hypothesis explains the movement of sugar from the to the?
Wiki User
∙ 13y ago
The movement of sugars in the phloem begins at the source, where (a) sugars are loaded (actively transported) into a sieve tube. Loading of the phloem sets up a water potential gradient that facilitates the movement of water into the dense phloem sap from the neighboring xylem (b). As hydrostatic pressure in the phloem sieve tube increases, pressure flow begins (c), and the sap moves through the phloem by mass flow. Meanwhile, at the sink (d), incoming sugars are actively transported out of the phloem and removed as complex carbohydrates. The loss of solute produces a high water potential in the phloem, and water passes out (e), returning eventually to the xylem.
Wiki User
∙ 13y ago
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Which of the following statements about the distribution of sap throughout a plant is true?
The mechanism that explains the movement of sugars throughout a plant is called the pressure-flow hypothesis
What is an example of a non growth plant movement?
An example of a non-growth plant movement includes the tendency of a plant to bend in the direction of light.
Which of the might be a valid hypothesis for why a plant appears to be dying?
Lack of sunlight or water.
Which best explains the role of plant pigments in photosynthesis?
They absorb light energy.
What are the different types of tropic movement by plant?
no
Which of the following statements about the distribution of sap throughout a plant is true?
The mechanism that explains the movement of sugars throughout a plant is called the pressure-flow hypothesis
What physical principle explains the upward movement of water in a plant?
Principle of cohesion force among water molecules
What best describes the prediction of the height of an adult mustard plant determined by the weight of the seed it grew from?
The prediction is useful because it explains what observation will be made if a hypothesis is true
Plant that depends on diffusion to move materials?
I assume you are referring to the mass flow hypothesis, where water from the Xylem is diffused into the phloem, adding pressure inside of the phloem which causes the movement of materials through the plant. Any good A-level (erm...or American equivalent?) textbook will have a full description of mass flow hypothesis. I found (a long time ago :( ) when I was learning this that drawing yourself a diagram of it helps a lot. Good luck.
Is a hypothesis a question?
A hypothesis is not a question. If you are in Jr. High or something near that, you can use the structure: If......, then.... to state your hypothesis. For example: If I place one plant in a closet and one plant in the sunlight, then the plant in the sunlight will grow faster.
What is one hypothesis regarding plant evolution?
One hypothesis is that plant cells emerged as the product of an endosymbiosis between "primitive" eukaryotic cells and cyanobacteria.
How do plant leaves hypothesize?
I think you mean "photosynthesize". Plants are not sentient beings, and therefore, can not assert a hypothesis. This is as detailed as it gets, and explains it much better than I could hope to: http://en.wikipedia.org/wiki/Photosynthesis#In_plants
What are the steps in the pressure-flow hypothesis?
The pressure-flow hypothesis is a year-round ordeal. There are two major stops in this process. The "source" is also known as the photosynthesis cells. The "sink" is a place to store excess sugars. An example of a "sink" would be the actual carrot in a carrot plant. Once all of the leaves die, the plant stores the glucose in the carrot. In the pressure-flow hypothesis, sugars are being made in the photosynthesis cells. Once it comes to the time of year that we call fall, the plant's leaves begin to die. The plant responds to this situation by sending its extra sugars from the source to the sink (which is usually its roots). After the fall and winter, during our spring, the plant sends the sugars back up the xylem tubes, which brings them to the leaves. Inside the leaves, there are the photosynthesis cells. This is the point at which the whole process starts again.
What is the hypothesis growing plant without soil?
GG
What are the mechanisms of closing over the prey for Venus Flytraps?
The Venus Flytrap uses a type of movement called a nastic movement wish is caused by a sudden stiffening in turgor pressure. Turgor pressure is pressure built up by water. That is why when a plant does not have enough water, it wilts from lack of this turgor pressure. I give credit to this knowledge to: Seventh Grade Science Class ;)
What is the different between turgor pressure and diffusion?
The difference of turgor pressure and diffusion is that turgor pressure is an osmotic pressure exerted by the contents of a plant cell against its cell wall; while diffusion is a movement of molecules from an area higher concentration to an area lower concentration.
How you start a hypothesis on a plant project?
A hypothesis is an informed prediction as to what is a fact. To make a hypothesis on anything, the first step is to learn basic information about it, and then to make your prediction based on this knowledge. Remember, a hypothesis is not a guess.
