Examlex
Which of the following is NOT a characteristic of the extrusive igneous rock obsidian?
Centrosome
An organelle that serves as the main microtubule organizing center in animal cells and plays a crucial role in the spatial distribution of cells.
Membranous Sacs
Enclosed structures within cells, bounded by lipid bilayers, that carry out various functions such as storage and transport.
Granular Body
Cytoplasmic structures composed of granules, found in various types of cells, often associated with the storage and secretion of substances.
RNA
Ribonucleic acid, a nucleic acid present in all living cells that acts as a messenger carrying instructions from DNA for controlling the synthesis of proteins.
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