Write the relation between general culture and political culture.
Answers
Explanation:
culture can be defined as an artificial environment in which the algae grow. In theory, culture conditions should resemble the alga’s natural environment as far as possible; in reality many significant differences exist, most of which are deliberately imposed.
A culture has three distinct components: a) a culture medium contained in a suitable vessel; and b) the algal cells growing in the medium; and c) air, to allow exchange of carbon dioxide between medium and atmosphere.
Extensive measures must be taken to keep pure unialgal cultures chemically and biologically clean. Chemical contamination may have unquantifiable, often deleterious, and therefore undesirable effects on algal growth. Biological contamination of pure algal cultures by other eukaryotes and prokaryotic organisms in most cases invalidates experimental work, and may lead to the extinction of the desired algal species in culture through out-competition or grazing. In practise, it is very difficult to obtain bacteria-free (axenic) cultures, and although measures should be taken to minimize bacterial numbers, a degree of bacterial contamination is often acceptable.
For an entirely autotrophic alga, all that is needed for growth is light + CO2 + H2O + nutrients + trace elements. By means of photosynthesis the alga will be able to synthesize all the biochemical compounds necessary for growth. Only a minority of alga seem, however, to be entirely autotrophic; many are unable to synthesize certain biochemical compounds (certain vitamins, for example) and will require these to be present in the medium. This condition is known as auxotrophy.
Based on their growth characteristics, two kinds of cultures can be defined.
In limited volume (batch) cultures, resources are finite. When the resources present in the culture medium are abundant, growth occurs according to a sigmoid curve, but once the resources have been utilised by