Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Textbook Question
Chapter 46, Problem 5RQ
What is senescence? Describe some changes that accompany leaf senescence in the fall. Which hormone causes abscission?
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Describe two events or factors that can trigger leaf senescence. In what ways is leaf senescence a recycling process?
Compare the leaf structure of Nerium to Ligustrum.
Look for stomata. Where are they located? On the upper or lower leaf surface?
How is the surface of the leaf modified? Can you recognize why these leaves are said to have “sunken stomata”?
Look for “hairs” on the leaf surface. Where are they located? How are they advantageous?
How does the appearance of each tissue layer in Nerium differ from Ligustrum? Compare the upper epidermis to the lower epidermis.
Compare the amount of cuticle.
What physiological changes occur during leaf abscission?
Chapter 46 Solutions
Biology
Ch. 46.1 - list six important types of plant hormones?Ch. 46.1 - Prob. 2CYLCh. 46.2 - Explain how the Darwin experiments using caps and...Ch. 46.2 - Prob. 1CTCh. 46.2 - Prob. 2TCCh. 46.2 - Prob. 3TCCh. 46.2 - Agricultural biotechnologists have developed...Ch. 46.2 - explain the roles of plant hormones in seed...Ch. 46.2 - Prob. 2CYLCh. 46.2 - Prob. 3CYL
Ch. 46.2 - Prob. 4CYLCh. 46.2 - Prob. 5CYLCh. 46.2 - Prob. 6CYLCh. 46.3 - Although insects are major plant predators,...Ch. 46.3 - Prob. 1HYEWCh. 46.3 - explain how plants that are attacked by predators...Ch. 46.3 - explain how plants that are attacked by predators...Ch. 46.3 - Prob. 3CYLCh. 46.3 - Prob. 4CYLCh. 46.3 - Prob. 1TCCh. 46 - Prob. 1MCCh. 46 - Prob. 2MCCh. 46 - Prob. 3MCCh. 46 - Prob. 4MCCh. 46 - Prob. 5MCCh. 46 - Prob. 1FIBCh. 46 - Prob. 2FIBCh. 46 - Prob. 3FIBCh. 46 - Prob. 4FIBCh. 46 - The hormone _________ causes stomata to close when...Ch. 46 - Compare phototropism and gravitropism in roots and...Ch. 46 - Prob. 2RQCh. 46 - What is a phytochrome? How do the two forms of...Ch. 46 - Which hormones cause fruit development? Which...Ch. 46 - What is senescence? Describe some changes that...Ch. 46 - Prob. 6RQCh. 46 - Describe one example of a plant chemical defense...Ch. 46 - Describe how a sensitive plant closes its leaves....Ch. 46 - A student reporting on a project said that one of...Ch. 46 - Prob. 2AC
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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
- How does the growth of eudicot and grass leaves differ? Which type would be more capable of recovering from attack by leaf-eating insects or grazing deer?arrow_forwardSecondary growth in stems involves two meristems. Identify and describe these two meristems, explain what tissues they are responsible for producing (including their functions), and explain the direction of cell division in which those tissues are produced in relation to the epidermis. For the last part of this question referring to the direction of cell division, make sure to address why cell division is occurring in two different planes. Also, as part of your answer, name and explain the functions of the tissues from the center of the stem to the dermal layer, in order, for a stem conducting secondary growth.arrow_forwardWhat are the steps involved in formation of a root nodule?arrow_forward
- Sketch observations of Lima bean root cross section and corn root cross section. Label the epidermis, cortex, endodermis, vascular cylinder and pith.arrow_forward. Compare the leaf structure of Potamogeton to Ligustrum. Look for stomata. Where are they located? On the upper or lower leaf surface? Does Potamogeton have sunken stomata or leaf hairs? Look at the area beneath the upper epidermis and compare it to the Ligustrum and Nerium leaves. How does it differ? What value does this have for the plant? How does the appearance of each tissue layer in Potamogeton differ from Ligustrum? Compare the upper epidermis to the lower epidermis. Compare the amount of cuticle. Compare the organization of the mesophyll cells to those in Ligustrum.arrow_forwardWhat is the leaf cuticle?arrow_forward
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