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How can adhesion, cohesion, and surface tension work in plants?
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- What is the Cohesion-Tension hypothesis? What is the source of energy that creates the tension? Where on the plant does the tension form? What properties of water are important for this hypothesisWhat is the wall resistance of plant cells? Does this resistance facilitate or make difficult the entrance of water into the cell?What is cell signaling? What is cell communication? Why are the cell signaling and cell communication essential for the plant growth and response? What is signal transduction?
- What are the extremely fine holes that interconnect plant cells? What is the name of the especially thin areas of walls where these holes are particularly common ?What condition do plant cells prefer (hypotonic/isotonic/hypertonic)?Consider a plant that is exposed to extreme cold temperatures. Do the cells of this plant manipulate the composition of their membranes in response to this environmental stress?If not, explain why the plant does not manipulate membrane composition in response to this stress.If so, explain the specific changes that these cells would carry out in response to this environmental stress.
- You place a flaccid plant cell (Ψ = -0.7 MPa) into an environment (beaker) of sucrose solution (Ψ = -0.9 MPa). Compare the initial conditions of the flaccid cell and the environment (beaker of sucrose solution) in terms of: D) Water potential (high or low) of the cell E) Solute concentration (high or low) of the cell F) Tonicity (hypertonic, hypotonic, or isotonic) of the cell G) Predict the direction of water movement (into the cell, out of the cell, or no net movement)The corner of the cells of collenchyma tissue in plant are thickened due to deposition of _____ A) Lignin and suberin B) Suberin and cutin C) Cellulose and pectin D) Chitin and ligninWhat is meant by suction force of the plant cell? Does the suction force facilitate or make difficult the entrance of water into the cell?