Q7: select the best answer that applies Which of the following is correct?Products of photosynthesis move from source to sink.The highly concentrated solution of sugar in the sieve tube members causes water to enter by osmosis from nearby xylem elements.All are correct.The Pressure Flow Hypothesis may explain translocation in the phloem.After being uploaded from the phloem, sugars are usually converted to starch or other compounds.

Photosynthesis is the process by which green plants synthesize food using sunlight, carbon dioxide…

Answered: Which of the following is correct?…

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter26: Plant Nutrition And Transport

Section: Chapter Questions

Problem 13SA

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Water potential is (a) the formation of a proton gradient across a cell membrane (b) the transport of a watery solution of sugar in phloem (c) the transport of water in both xylem and phloem (d) the removal of sucrose at the sink, causing water to move out of the sieve tubes (e) the free energy of water in a particular situation
There is a trade-off between photosynthesis and transpiration in leaves because (a) numerous stomatal pores provide both gas exchange for photosynthesis and openings through which water vapor escapes (b) a waxy layer, the cuticle, reduces water loss (c) blue light triggers an influx of potassium ions (K+) into the guard cells (d) leaves of deciduous plants abscise as winter approaches in temperate climates (e) stomata are closed at night, although water continues to move into the roots by osmosis
Figure 30.34 Which of the following statements is false? Negative water potential draws water into the root hairs. Cohesion and adhesion draw water up the xylem. Transpiration draws water from the leaf. Negative water potential draws water into the root hairs. Cohesion and adhesion draw water up the phloem. Transpiration draws water from the leaf. Water potential decreases from the roots to the top of the plant. Water enters the plants through root hairs and exits through stoma.
If a hole is punctured in xylem or phloem elements while transpiration is going on, will liquid or gas come out or go into the elements? Group of answer choices it will come out of both. it will come out for xylem but go in of phloem. it will go in for xylem but come out of phloem. it will go into both.
Arrange the following four events in an order that explains the mass flow of materials in the phloem. 1)Water diffuses into the sieve tubes.2)Leaf cells produce sugar by photosynthesis.3)Sucrose is actively transported into sieve tubes.4)Sugar moves down the stem due to positive pressure. A. 1, 2, 3, 4 B. 2, 3, 1, 4 C. 4, 2, 1, 3 D. 2, 4, 1, 3
Which of the following statements is inaccurate?a. Water that evaporates from leaves is ultimately replaced by water diffusing from the xylem.b. Xylem transports water up the plant while phloem transports carbohydrates throughout the plant.c. Water movement in the xylem is largely due to the pressure-flow hypothesis.d. Water movement across membranes is often due to differences in solute concentrations.
But how are the two types of mesophyll involved? From what I understand, CO2 enters the stomata, and then the citric acid cycle of the mitochondia in the mesophyll use the carbon atoms do produce glucose, which then goes through phloem loading and it either used or stored. My question, I guess, is how exactly are the two types of mesophyll involved? Is only one used or are both used at different times in the production of the glucose?
Which of the following is true for the function of xylem and phloem? * A. Xylem transports water from leaves to roots; phloem transports sugar from roots to leaves B. Xylem transports sugar from roots to leaves; phloem transports water from leaves to roots C. Xylem transports water from roots to leaves; phloem transports sugar from leaves to roots D. Xylem transports sugar from leaves to roots; phloem transports water from roots to leaves
Movement of phloem sap from a source to a sink(A) occurs through the apoplast of sieve-tube elements.(B) depends ultimately on the activity of proton pumps.(C) depends on tension, or negative pressure potential.(D) results mainly from diffusion.
Which of the following statements is are TRUE? Ca pathway involves a single C02 fixation step. In CAM plants. stomata are open during day time. Chlorophyll pigments absorb maximum light in the green wavelength. Reaction center of PSI is P700
Which of the following plant structures is necessary for transpiration to occur? a. Sieve tubes c. Fruits b. Leaves d. Roots
Write in the boxes on the image to describe the events that are occurring in each step of xylem transport. Be sure to use the terms: transpiration, tension, cohesion, osmosis, and stomata.

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