Chloroplasts are very sensitive to light and are capable in.
The presence of too much sugar in solution in the sap of the cell inhibits the activity of the chloroplasts; hence the necessity for its removal.
The chloroplasts are generally distinguished by their green color, which is due to the presence of chlorophyll; but in many Algae this is masked by another coloring matterPh ycoerytlsrin in the Florideae, Phycophaein in the Phaeophyceae, and Phycocyanin in the Cyanophyceae.
The chloroplasts increase in number by division., which takes place in higher plants when they have attained a certain size, independent of the division.
It is highly probable that starch is only produced as the result of the activity of chromatophores, either in connection with chromoplasts, chloroplasts or leucoplasts.