Many of the major events in early oogenesis are universally conserved, and some are co-opted for species-specific needs.
Environmental refinement can be defined as any modification in the environment of captive animals that seeks to enhance the physical and psychological well-being of the animals by providing stimuli which meet the animals' species-specific needs.
Tandem duplicates and gene loss within the mir-64 cluster may modulate miRNA dosage to strengthen gene expression regulation according to species-specific needs (Doench and Sharp 2004).
Divergence and adaptation of an ancestral function(s) to meet lineage or species-specific needs might explain this similarity, much like the proposal for ELT-2 proteins.
However, abundant H3K27me marks were found in Tetrahymena [ 5], suggesting that H3K27me marks have evolved for species-specific needs as well.
It is interesting to note also the D. melanogaster specific cluster (SET-Dm) in this group suggesting an intriguing property of the SET5/6-related genes towards proliferation and adaptation for species-specific needs by diverse organisms.
In particular, community and species specific responses need to be related to characteristics of the urbanised landscape, i.e. the urban rural gradient needs to be operationalised in terms of specific disturbance features.
Behind these numbers are a hugely diverse range of species, all with specific needs, some challenging, some less so.
However, there are cell-type and species specific differences that need to be evaluated empirically to optimize the conditions for transfection efficiency and cell survival.
39 40 Species specific antivenom is needed to neutralise the circulating venom; however, prazosin, by antagonising sympathetic overactivity and correcting deranged metabolism, is effective against envenomation by different scorpion species.
Larger areas were presumed to have greater habitat heterogeneity and could, therefore, host a larger number of species each with its own specific needs.
