Homework Help is Here – Start Your Trial Now!
Science
Biology
Based on the paragraphs please explain what is going on in these two pictures

Based on the paragraphs please explain what is going on in these two pictures

Biology (MindTap Course List)
Biology (MindTap Course List)
11th Edition
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Chapter35: Stem Structure And Transport
Section35.1: Stem Growth And Structure
Problem 2C
See similar textbooks
icon
Related questions
Question
Based on the paragraphs please explain what is going on in these two pictures
Using the same shoot, a water front approached a point where a leaf was in physical contact with and lying atop another leaf (as indicated by the arrow in Figure 4a). The water was transferred from the wet leaf to the dry leaf, whereupon the flow continued in both axial directions. Once again, water movement in this situation was only possible if water moved via the external surface. There was no possibility for the movement of internal water from one leaf to another without a physical conduit from the internal water of one leaf to the exterior surface of the other, for example, if the wetted leaf had a cut or crack in the tissues surrounding the leaf interior. Such a cut/crack was not present in the leaf used in this experiment. 00:18:45 00 20:00 (a) (b) (c) 00 25:00 00.30,00 00 40:00 (d)
Transcribed Image Text:Using the same shoot, a water front approached a point where a leaf was in physical contact with and lying atop another leaf (as indicated by the arrow in Figure 4a). The water was transferred from the wet leaf to the dry leaf, whereupon the flow continued in both axial directions. Once again, water movement in this situation was only possible if water moved via the external surface. There was no possibility for the movement of internal water from one leaf to another without a physical conduit from the internal water of one leaf to the exterior surface of the other, for example, if the wetted leaf had a cut or crack in the tissues surrounding the leaf interior. Such a cut/crack was not present in the leaf used in this experiment. 00:18:45 00 20:00 (a) (b) (c) 00 25:00 00.30,00 00 40:00 (d)
After providing water to the cut end (stem) at the bottom, water ascended on the surface of the T. usneoides shoot, despite the break (highlighted in the close-up of Figure 3a), where the xylem was disconnected, but a minor fraction of the epidermis remained intact, holding the shoot together and providing a "water bridge." Within about 8 min, the water arrived at the break in the shoot (a velocity of about 0.03 mm s-1), whereupon it continued over the epidermal spanned gap, and transport then continued along the shoot opposite the split. Flow velocity on this side was reduced to half, which means the break hindered the transport of water but did not block it as would be expected in the case of internal xylem transport. Maintaining the flow across a 0.2-mm gap in the broken shoot was possible only by capillarity and the cohesive strength of liquid water from one section of the shoot to the other. Such flow should be impossible in the broken and disconnected.xylem cells. 00.01:15 00:02:30 00:03:45 00:05.00 (a) (b) (c) (d) (e) 00:06 15 00 08:45 00:10.00 00:15.00 00:17:30 (a) (h)
Transcribed Image Text:After providing water to the cut end (stem) at the bottom, water ascended on the surface of the T. usneoides shoot, despite the break (highlighted in the close-up of Figure 3a), where the xylem was disconnected, but a minor fraction of the epidermis remained intact, holding the shoot together and providing a "water bridge." Within about 8 min, the water arrived at the break in the shoot (a velocity of about 0.03 mm s-1), whereupon it continued over the epidermal spanned gap, and transport then continued along the shoot opposite the split. Flow velocity on this side was reduced to half, which means the break hindered the transport of water but did not block it as would be expected in the case of internal xylem transport. Maintaining the flow across a 0.2-mm gap in the broken shoot was possible only by capillarity and the cohesive strength of liquid water from one section of the shoot to the other. Such flow should be impossible in the broken and disconnected.xylem cells. 00.01:15 00:02:30 00:03:45 00:05.00 (a) (b) (c) (d) (e) 00:06 15 00 08:45 00:10.00 00:15.00 00:17:30 (a) (h)
Expert Solution
Step 1

The pictures are demonstrating the water transport mechanism. Water is being absorbed by the roots and transferred to the shoot by means of xylem.

steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Types of communication
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Biology (MindTap Course List)
Biology (MindTap Course List)
Biology
ISBN:
9781337392938
Author:
Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:
Cengage Learning
SEE MORE TEXTBOOKS