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Growth and Division of the Cell: Chapter 4 (Growth Phase of the Cell Cycle…
Growth and Division of the Cell: Chapter 4
Concepts
Cell Cycle
Mitosis and Meiosis
Growth Phase of the Cell Cycle
G1 Phase
First phase after division
Growth of the cell
S Phase
Second Phase
Where DNA is replicated
Histones
Chromosomes
G2 Phase
Last Phase before division
the Spindle Microtubles are formed
Resting Phase or Interphase
Division Phase of the Cell Cycle
Mitosis
Cytokinesis
Meiosis
Meiosis I
Meiosis II
Plants and People: Controlled Growth Versus Cancerous Growth
Karyokinesis and Cytokinesis are the controlled steps so that the cell does not become cancerous
Cancerous cells in humans is lethal where in plants it is not
Alternatives: Rates of Growth
Arithmetic Increase
Geometric Increase
Less Common Types of Division in Plants
Karyokinesis occurs without cytokinesis
Coenoctyes
Cell Division in Algae
Nuclei
Algae have external and internal spindles
Different from both plants and animals nuclei
Cytokinesis
Phycoplast
Some algae pinches its membrane into two
Some grow a cell plate
Phragmoplast
Cell Division of Prokaryotes
No meiosis or mitosis
Cytokinesis is simple and occurs by a process of infurrowing
short cell cycle
Botany and Beyond: Chloroplast Division During Leaf Growth
Leaf size contrbutes to the speed of nuclear DNA
Division of Chloroplasts and Miochondria
Circle naked DNA
Infurrowing or pulling apart
Lack Plastids
