Primary and secondary growth

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Presentation transcript:

Primary and secondary growth

Primary Growth

Primary growth mitosis cell division cell elongation

Cell division in the root hairs mitosis cell elongation differentiation

Growing points in lateral buds mitosis cell division and elongation

Mitosis – cell division for growth and repair (asexual) 2. Chromosomes make copies of themselves which are initially stuck together. A single cell with 4 chromosomes, in 2 pairs. 1. Chromosomes untangle shorten and thicken. 3. Chromosomes line up. 5. Two identical daughter cells are made. 4. Identical pairs of chromosomes separate as the cell squeezes in the middle.

Cross Section of Monocot and Dicot stems

Vascular bundles

Xylem and Phloem

Annual Growth Rings