A living organism must be studied from two distinct aspects. One of these is the causal-analytic aspect which is so fruitfully applicable to ontogeny. The other is the historical descriptive aspect which is unravelling lines of phylogeny with ever-increasing precision. Each of these aspects may ...
It is possible for the impact of an organism to have a disproportionate effect on the environment relative to its abundance. For example, in a FISH-NanoSIMS based study by Musat et al. (2008) the purple sulfur bacterium Chromatium okenii, representing 0.3% of total microbial cell numbers, ...
The formation of plant callus tissue, composed in large part of uniform cells, is not considered a regression in the developmental lineage but rather an opening to increase the developmental potency (Feher2019). Reprogramming of the callus due to the culture conditions can induce plant regeneration ...