Sentence examples for some facultative from inspiring English sources

Haustoria, which may be short, bulbous protrusions or large branched systems filling the whole cell, are characteristically produced by obligate (i.e., invariably parasitic) parasites; some facultative (i.e., occasionally parasitic) parasites also produce them.

Group I includes NifD sequences from many genera within Bacteria, including all nitrogen-fixing aerobes examined, as well as strict anaerobes and some facultative anaerobes, but no archaeal sequences.

Consider a semelparous population composed of a genotype (A) that reproduces at age one year (like an annual plant) and another genotype (FD) that facultatively delays reproduction for one year when conditions are bad (i.e., if population is likely to decrease), then reproduces the next year regardless of year quality (like some facultative biennials).

Also, enrichment in mobile elements seems to be linked to genome plasticity in some facultative symbionts (Gillespie et al. 2012).

Within the Leotiomyceta, the kinases appear to be most prevalent in pathogenic species representing different taxonomic classes, in particular phytopathogens, but also some facultative human and insect pathogens.

Instead, genome reduction of X. poinarii seems to have been mediated by the excision of genomic blocks from the flexible genome, as reported for the genomes of attenuated free pathogenic bacteria and some facultative mutualistic bacteria growing exclusively within hosts.

For example, some are aerobes (require oxygen), some are anaerobes (grow only in the absence of oxygen), and some are facultative (they grow in either condition).

Some are facultative mutualists, such as symbionts that make their hosts resistant to parasitoids (Oliver et al. 2003).

Some symbionts, particularly some that are facultative for hosts, are more recently derived compared with ancient nutritional symbionts (Buchner 1965), and despite being related to pathogens, have conditionally beneficial effects upon their hosts (reviewed in Oliver et al. 2010).

They also exhibited a mixed mating system, with some degree of facultative outcrossing (at least initially), allowing for some recombination between divergent haplotypes.

Some species, called facultative anaerobes, are able to grow either with or without free oxygen.