Explain why free oxygen gas probably was not in the early atmosphere of Earth.

Life table data can be used to project the future age structure, size, and growth rate of a population. a. Age structure – the proportions of the population in each age class. N t+1 b. λ= defines the population size in year t + 1 to the population size of t the year t, giving a yearly growth rate. Therefore, is the yearly growth rate. Stable Age Distribution –growth rate eventually settles on a constant value and usually becomes constant to age groups. One of the maxims of ecology is that “no population can increase in size forever.”