BIO120H1 Lecture Notes - Lecture 19: Exponential Decay, Infant Mortality, Exponential Growth
36
BIO120H1 Full Course Notes
Verified Note
36 documents
Document Summary
Life history = the time of their lifespan where different things happen specially organisms are born small, pre-productive period resource accumulation period. After accumulating resources then they switch to sexual maturity and start reproducing. Age structure of population: (reproductive rate and survivorship vary with age) still considers a single population: predict population growth if we have age structure and conservation, helps understand evolution, human affairs. *babies are at the base each successive bar is another 5-year class. *start off with a lot of babies and end up with a few centennials shape of the graph = distribution. Infant mortality was reduced that"s wy the bar got wider 1901. Reduced birth rate in 1931 due to ww1. 1961 reduced birth rates due to ww2. *people not producing babies economic factors and availability of birth control n0 = babies conventional to ignore males because females produce offspring the number of potential mothers" limit how many daughters can be produced in a population.
