We present results from the first year of a three-year extramurally funded project involving a partnership between an ethnically diverse urban high school and professional research botanists. The goals are to provide students exposure to real-world science, broaden interest in scientific fields of study, and increase floristic data and herbarium…

This paper reports on studies of the deterministic and stochastic behaviours of a predator-prey system with prey-dependent response function. The first part of the paper deals with the deterministic analysis of uniform boundedness, permanence, stability and bifurcation. In the second part the reproductive and mortality factors of the prey and…

A simple problem relating to birds chasing each other gives rise to a homogeneous differential equation. The solution draws on student skills in differential equations and basic co-ordinate geometry.

Presented is an accounting of known numbers of major categories of life, from viruses to mammals. The construction of the census is described. Included are living and nonliving species and genera. (CW)