[Show abstract] [Hide abstract] ABSTRACT: Computing the phylogenetic diversity of a set of species is an important part of many ecological case studies. More specifically, let \(\mathcal {T}\) be a phylogenetic tree, and let R be a subset of its leaves representing the species under study. Specialists in ecology want to evaluate a function \(f(\mathcal {T},R)\) (a phylogenetic measure) that quantifies the evolutionary distance between the elements in R.
buying behaviour noun [U]. âº MARKETING, COMMERCE the way that âpeople âbehave when they âbuy things, such as what they âbuy, where and when they âshop, and how much they âspend: Higher âenergy âcosts âprompted many âgrocery âshoppers to âchange their âbuying âbehaviour last âyear.
Purchasing is the formal process of buying goods and services. The purchasing process can vary from one organization to another, but there are some common key elements.The process usually starts with a demand or requirements â this could be for a physical part (inventory) or a service.urchasing is the formal process of buying goods and services. The purchasing process can vary from one organization to another, but there are some common key elements.