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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

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Chapter
Section
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 23, Problem 10SQ
Textbook Problem
40 views

Some nitrogen-fixing cyanobacteria can partner with a fungus to form a ______.

  1. a. mycelium
  2. b. lichen
  3. c. mycorrhiza
  4. d. fruiting body

Summary Introduction

Concept introduction: Lichen is a symbiotic association existing between a fungus and a photosynthetic partner, usually a cyanobacterium. The properties exhibited by lichens always create confusion while differentiating it as a plant or fungus, but lichens are definitely not plants. They are found in all extreme environments extending from deep sea to high alpine elevations.

Explanation of Solution

Reason for the correct answer: A lichen is a complex organism composed of a photosynthetic and a fungal partner, where the fungal partner is called mycobiont and the algal part is called phycobiont. There is a symbiotic relationship between these two groups in which the fungal partner protects the algae partner from extreme moisture, and in turn the algal partner provides organic food to the fungus.

Option b. is given as, “lichen”. A lichen is a symbiotic association between fungus and cyanobacteria. Therefore, option b. is the correct answer.

Reasons for the incorrect answers:

Option a...

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