Structure of the Seed. Acetic orcein staining of polytene chromosomes was introduced in 1941 shortly after the initial studies on aceto-carmine-stained chromosomes by Bridges (2) and has remained a standard method of preparation. An unopened bud of Tradescantia is obtained; The anther is removed and placed on a microscope slide. Biochemical processes in the cell are controlled by the nature and arrangement of internal membranes, the presence of specific enzymes, and environmental factors A cover slip is added and observations made. Examining the stages of meiosis. A typical seed consists of a seed coat enclosing an embryo. Orcein dye can be purchased in both its natural … A cover slip is added and observations made. In eukaryotic cells, specialised organelles facilitate biochemical processes of photosynthesis, cellular respiration, the synthesis of complex molecules (including carbohydrates, proteins, lipids and other biomacromolecules), and the removal of cellular products and wastes (ACSBL049) Different stages of mitosis can be observed. aceto-orcein is added and the root tip macerated using a scapel. The seed coat is the outer covering which, in most seeds, is made up of the two layers, an outer testa and inner one, the tegmen. aceto-orcein is added and the root tip macerated using a scapel. A stain e.g. A stain e.g. AUSTRALIAN CURRICULUM ALIGNMENT.
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