Cell Specialization

• the sex of the egg
• the age of the egg
• the size of the egg
• the genes of the egg

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• internal stem cells
• internal root cells
• cells on the plant surface
• cells in the plant reproductive system

• location of the cell in the body
• function of the cell in the body
• different patterns of gene expression

• different combinations of genes in the nucleus

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• In an octopus, cells divide repeatedly to reform a lost tentacle.
• In a human, the red blood cells lack nuclei and help to transport oxygen.
• In a bacterium, a single cell removes waste products and aids in cell division.
• In a plant, xylem cells transport water, and phloem cells transport food.

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• Carbohydrates in each type of cell repress some types of protein production.

• Different mRNA molecules are found in different parts of the body.

• The cells have different chromosomes and code for different enzymes.

• Different genes are activated in cells based on their envioronment.

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• systems cells tissues organs organelles
• organelles cells tissues organs systems
• cells tissues organelles organs systems
• organelles cells organs tissues systems

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• bone
• fat
• muscle
• skin

• after several divisions of the fertilized egg
• after the first division of the fertilized egg
• only after the organism has reached puberty
• prior to the first division of the fertilized egg

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• connective
• epithelial
• muscle
• nervous

• Stem cells are any body cells, such as mature red blood cells, that lack DNA.
• Stem cells are unspecialized cells that are able to differentiate into various cell types.
• Stem cells are cells that have temporarily differentiated into specialized cells. 
• Stem cells are cells in multicellular organisms that are unable to perform cell division.

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