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Root Nodule Formation

View the animation below, then complete the quiz to test your knowledge of the concept.






1Which of the following genera is capable of nitrogen fixation?
A)Clostridium
B)Corynebacterium
C)Aspergillus
D)Rhizopus
E)Rhizobium



2Arrange the following in the proper order in which they occur during nitrogen fixation.
1. Formation of bacteroids.
2. Movement of bacteria through infectious thread.
3. Curling of root hair
A)1, 2, 3
B)2, 1, 3
C)2, 3, 1
D)3, 2, 1
E)3, 1, 2



3In which of the following structures does nitrogen fixation take place?
A)nucleus
B)infectious thread
C)symbiosome
D)bacteroid
E)cellulosic tube



4Legume roots secrete Nod factors that attract nitrogen-fixing bacteria to the root hair.
A)True
B)False



5Nitrogen-fixing bacteria attach to lectin receptors on the surface of plant cells.
A)True
B)False







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