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Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called:

1. Efficiency index	2. Plasticity
3. Norm of reaction	4. Developmental noise

Subtopic: Growth Terminology | Development |

96%

Level 1: 80%+

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To differentiate into a tracheary element, a cell would:

1.	Gain protoplasm
2.	Become multinucleate
3.	Assimilate lot of collagen and elastin
4.	Develop lignocellulosic secondary cell wall

Subtopic: Development | Differentiation, Dedifferentiation and Redifferentiation |

79%

Level 2: 60%+

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