BIOLOGY:HOW LIFE WORKS (LL)-PACKAGE
3rd Edition
ISBN: 9781319369163
Author: Morris
Publisher: Macmillan Higher Education
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Chapter 31.1, Problem 2SAQ
Summary Introduction
Xylem, as well as the phloem, are the two kinds of vascular tissues seen in the plants. These structures make up the vascular bundles. Functions of xylem and phloem are to transport materials such as water, food, organic materials and so on. This transport takes place between the stems, leaves, and roots of plants.
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Why is phloem transport considered an active process?
Can the direction of phloem transport change? Does phloem ever transport material into a leaf?
Why is the secondary xylem and phloem always to either side of the vascular cambium?
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BIOLOGY:HOW LIFE WORKS (LL)-PACKAGE
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- How is the movement of water through the xylem different from the movement of food through the phloem in the stem? What is the significance of transpiration in plants? Why do plants transpire?arrow_forwardSketch side by side two daughter cells formed after mitosis of a meristematic cell in the vascular cambium of a eudicot stem. Label the cell formed toward the interior of the stem a meristematic cell. Should the daughter cellformed toward the outside be labeled primary xylem, primary phloem, secondary xylem, or secondary phloem?arrow_forwardwhy is pressure higher in parts of the phloem Where sugar is being loaded than in parts were sugars been removed?arrow_forward
- Why do plants make such an extensive investment belowground?arrow_forwardHow are sugars transported in phloem? the formation of starch from sugar in the sink increases the osmotic concentration high turgor pressure in source sieve-tube elements pushes phloem sap to sink sieve-tube elements with low turgor pressure water is actively transported into the source region of the phloem to create the turgor pressure needed the combination of a high turgor pressure in the source and transpiration water loss from the sink moves solutes through phloem conduitsarrow_forwardWhy does a layer of periderm offer only temporary protection? When the plant makes a new layer of cork cambium, does it make the new layer to the outer side of the failing periderm or to the inner side of it, deeper in thesecondary phloem?arrow_forward
- What is secondary xylem and secondary phloem?arrow_forwardBut 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?arrow_forwardDoes the palisade mesophyll or the spongy mesophyll have a greater role to play in transpiration? Explain.arrow_forward
- Explain how xylem and phloem enabled some land plants to inhabit drier environments than their ancestors. H▾ E▾ B I A ▾ X₂ X² Ω· Ξ 66arrow_forwardIn a cross-section of a tree, where are the oldest growth rings—in the outer region or nearer the pith? Where is the oldest secondary phloem—near the outside of the tree or near the cambium?arrow_forwardWhich of the following parts of a tree are involved in transpiration? Group of answer choices Leaves, Xylem, Stolons Stomata, Xylem, Phloem Leaves, Phloem, Roots Stomata, Phloem, Roots Leaves, Xylem, Rootsarrow_forward
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