BIO230H1 Lecture 4: Lecture 4 and 5 Readings.docx
42
BIO230H1 Full Course Notes
Verified Note
42 documents
Document Summary
An animal/ plant starts it life as a fertilized egg. Cell divides repeatedly to produce many different cells. Cells differ b/c they have different specialized genes. Cell proliferation: producing many cells that are different from one another. Cell specialization: creating cells that have different characteristics in different positions. Cell interaction: coordinating the behaviour to match neighbours cells. Cell movement: rearrangement of cells to form structure tissues. Develop embryos can happen all at once. Proteins from different species can function within other species. Cells must differentiate to have different layers. Protective outer layer, gut to absorb food and muscles to move. Cell has material that cleaves to form smaller cells. Ectoderm: the precursor of the epidermis and nervous system. Endoderm: interior of the gut and appendages. Mesoderm: precursor of muscles and connective tissues. Gastrulation: ball into a structure of the gut. Multicellular animal are enriched in proteins mediating cell interactions and gene. Genome sequencing reveals that there are similarities between species.
