CURIOSITY is the KEY to CREATIVITY

Needs are never the

key to creativity

Creativity is not artistic, but

PROBLEM SOLVER

E.g.: Apple Inc CEO,

Steve Job

When you stop to ask questions, you stop growing

Study is not about exam, but the excitement when you learn

something new

Rebecca Choong, 2010

Cells in living things do not last forever, for they…

• Wear out after some time• Get damaged (through cuts, by ultraviolet

radiation or by hazardous environmental pollutants)

• Grow old naturally and die

Importance of new cells produced are genetically identical to their parent cells:

• Continue with the specific cell functions of their parent cells within a particular tissue

• Avoid disrupting the stable internal environment of life or its processes

• Produce offspring that have the complete functions of an adult organism (in asexual reproduction) to ensure the survival of that species

Significance of mitosis

• Nucleus contains chromosomes.• Each chromosome consists of a long DNA

molecule which carries genes in a linear sequence

• Gene determines the individual characteristics of an organism

Significance of mitosis

• The characteristic number of chromosomes is referred to as the chromosomal number of the species

• Exp: Onion cell – 16 chromosomes• Exp: Fruit fly - 8 chromosomes

Significance of mitosis

• Somatic cells have two sets of chromosomes, one set inherited from each parent.

• Each cell contains a diploid number of chromosomes (2n)

• In humans, each set consist of 23 chromosomes.

• Typical human somatic cell, 46 chromosomes arranged in 23 pairs or 2n = 46

Significance of mitosis• The two

chromosomes in each pair have the same structural features and are referred to as homologous chromosomes

Significance of mitosis

• Gametes contain only one set of unpaired chromosomes, or haploid number of chromosomes (n)

Cell Cycle

Uncontrolled Mitosis in Living Things

• Cancer• Cancerous cell - tumour

Application of mitosis

• Cloning

Application of mitosis

• Tissue culture