BIOA02H3 Lecture Notes - Lecture 3: Indeterminate Growth, Meristem, Evaporation
BIOA02 Module 1, Lecture 3: Plant Cells and Plant
Tissues
Difference Between Plants and Animals
Animals have determinant growth, it is very predictable how animals look when they reach
maturity
Plants have indeterminant growth, no two plants look the same when they reach maturity
➢ Needs meristems
Plants: undifferentiated cells → differentiated cells and undifferentiated → indeterminate
growth
Animals: undifferentiated cells → differentiated cells → determinate growth
Indeterminate Plant Growth
Gives rise to differentiated and undifferentiated cells
Undifferentiated cells remain undifferentiating and keep growing
➢ Whorls of branches to determine the age of a conifer
Oldest organisms: bristlecone pines 5064 years
Limitation to Tree Height/Age
There is a limitation despite have undifferentiated cells due to environmental factors
Determinate Animal Height
959 cells in adults of C. Elegans
Factors Limiting Growth
missing soil nutrients
meristematic slowdown
hydraulic pressure (top desiccation)
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BIOA02H3 Full Course Notes
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