Biology: The Unity and Diversity of Life
15th Edition
ISBN: 9780357093795
Author: STARR
Publisher: CENGAGE LEARNING (CUSTOM)
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Chapter 28, Problem 6SQ
Summary Introduction
Introduction: Symbiotic relationship of plant with nitrogen-fixing bacteria forms root nodules on the roots. The bacteria help to convert atmospheric nitrogen into a readily utilizable form for plants. This process is called as nitrogen fixation. Fixed nitrogen acts as a nitrogen fertilizer that promotes plant growth.
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Chapter 28 Solutions
Biology: The Unity and Diversity of Life
Ch. 28 - Prob. 1DAACh. 28 - Prob. 2DAACh. 28 - Prob. 3DAACh. 28 - Prob. 4DAACh. 28 - Prob. 1SQCh. 28 - Decomposing organic matter in soil is called...Ch. 28 - Prob. 3SQCh. 28 - Prob. 4SQCh. 28 - Prob. 5SQCh. 28 - Prob. 6SQ
Ch. 28 - Water evaporation from plant parts is called...Ch. 28 - Prob. 8SQCh. 28 - Prob. 9SQCh. 28 - Sieve tubes are part of ______. a. cortex b....Ch. 28 - With stomata closed, a waterproof cuticle ______....Ch. 28 - Prob. 12SQCh. 28 - Prob. 13SQCh. 28 - Prob. 14SQCh. 28 - Prob. 15SQCh. 28 - Nitrogen deficiency stunts plant growth and causes...Ch. 28 - You just returned home from a three-day vacation....Ch. 28 - Prob. 3CTCh. 28 - Prob. 4CTCh. 28 - Prob. 5CT
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- Some plants are recognized by fungal pathogens on the basis of their stomatal pores. Which of the following would provide these plants immunity from fungal infection? a. Removing all of the stomata from the plant b. Changing the spacing of stomatal pores in these plants c. Reinforcing the cell wall in the guard cells of stomatal pores d. Increasing the number of trichomes on the surfacesarrow_forwardRoot nodules contain ________ , which can _____________ .a. Azotobacter, fix N2b. Nitrosomonas, nitrify NH3-c. rhizobia, fix N2d. Bacillus, denitrify NO3_arrow_forwardFollowing infection with a pathogen, one response is to spread an alarm signal to increase defenses and antimicrobial compounds throughout the plant body and the network of plants connected by mycorrhizae. Which chemical spread this alarm signal? Select one: a. Salicylic acid b. Jasmonic acid c. Indole acetic acid d. Gibberellic acid e. Abscisic acidarrow_forward
- Which of the following is an example of secondary growth? a. increase in length b. increase in thickness or girth c. increase in root hairs d. increase in leaf numberarrow_forward. Which of the following is not a typical plant response to oxygen deficit due to flooding? * A. Aerenchyma formation B. Hyponastic growth of submerged leaves C. Stomatal closure D. Induction of anaerobic stress proteinsarrow_forwardWhich of the following plant hormones is produced in the root meristems, travel upward and in higher concentration counter the apical dominance caused by ____________? a. Gibberellins b. Ethylene c. Cytokinin d. Abscisic acidarrow_forward
- Sugar transport from leaves to roots occurs by_______ . a. a pressure gradient inside sieve tubes b. different solutes at source and sink regions c. the pumping force of xylem vessels d. evaporation, tension, and cohesionarrow_forwardSoil pH affects availability of nutrients for root absorption. The following statements are true except* a. Low pH results in an increase in Aluminum toxicity. b. Low pH results to unavailability of major nutrient elements. c. Toxic metals are more available in acidic soil. d. Low pH results in slow activity of soil-inhabiting microorganisms.arrow_forward_______attach mosses to soil. a. Rhizoids c. Roots b. Rhizomes d. Strobiliarrow_forward
- Plant root nodules are A. formed from gall-rotting bacteria that decompose plant roots. B. harmful to plants, because the bacteria outcompete the plants for nutrients. C.sites where nitrogen fixation occurs. D. structures created by fungi and are found in all agricultural crops.arrow_forwardWhichof the following is NOT an agent of nitrogen fixation?a.Mycorrhizal fungib.Cyanobacteria (blue-green algae)c.Bacteria associated with legume rootsd.Lightninge.Actinomycete bacteria associated with alder rootsarrow_forwardRoot hairs form in the zone of a. cell division. b. elongation. c. maturation. d. More than one of the choices are correct.arrow_forward
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