Biochemical Systematics and Ecology 

TL;DR: A survey of the phospholipid composition of 97 strains representing 20 genera of the Actinomycetales showed that five groups could be distinguished on the basis of the presence or absence of certain nitrogenous phospholips, with chemical heterogeneity of the genera Actinomadura, Corynebacterium, Micropolyspora and Nocardia.

TL;DR: Insect mitochondrial control regions are not necessarily the most variable region in the genome in terms of nucleotide substitution, and may not evolve faster than single-copy nuclear non-coding sequences.

TL;DR: This review summarizes the present knowledge regarding the biological activities of sesquiterpene lactones and their structure-activity relationships and suggests their evolutionary significance in plants as deterrents against herbivores and anti-fungal, anti-bacterial allelopathic agents.

TL;DR: The sum of the four major oil constituents, representing the phenol pathway, seems influenced by the climate's thermal efficiency; the hotter the climate, the higher their total concentration.

TL;DR: It is suggested that physiological constraints limit the defense combinations of any one species to a restricted subset of those observed, as species with the escape syndrome suffer much higher rates of damage.