Tuesday, 9 October 2012

Biology Chapter 10: Growth

BIOLOGY FOR MATRICULATION

Chapter 10 : Growth

Objective
  • to define the term of growth
  • to state 3 phases of individual growth
  • to explain how growth is measured
Overview
10.1 Growth Phases
10.2 Measurement Of Growth
10.3 Growth Patterns
10.4 Growth Rate 
10.5Growth Under Extreme condition



 10.1 Growth Phases

Definition of Growth
  •  any permanent increase in qualitative parameters (can be measured) e.g volume, width, length (height), cell number, dry mass, surface areas
  • which is not reversible
  • an increse in biomass, length and width over a specific time

Definition of Development

  • any qualitative changes e.g function, degree of specialization and complexity
  • involve cell differentiation, e.g red blood cell and xylem
Growth in Unicellular Organism

  • is restrictive by the size of its cytoplasm that is controlled by its nucleus
  • when achieve a certain size, it divides to produce 2 daughter cells of smaller size
to be continue.....

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