Coal isn’t a mineral.Coal is made of decomposed plant material which is organic , minerals are inorganic .
The cell cycle or cell-division cycle is the series of events that take place in a cell leading to its division and duplication of its DNA to produce two daughter cells. In bacteria, which lack a cell nucleus, the cell cycle is divided into the B, C, and D periods.
Clues such as fossils such as bones, footprints, tar, etc, preserved underground helped inform scientists. You can also count how old a tree is when you cut it open and there are some alive for thousands of years so that is a possible way.
Tissue-Resident Memory (TRM) can be found in both CD4+ and CD8+ T cell lineages and in a variety of tissue locations.
What are resident memory T cells?
- Resident memory T cells are long-lasting, non-recirculating memory T cells found in epithelial barrier tissues such the gastrointestinal tract, lungs, skin, and reproductive tract.
- In line with a recent study that found memory T cells specific for persistent viruses in human tonsils, the predominance of TRM-phenotype cells in all human lymphoid tissues include the spleen, lymph nodes, and tonsils, and reflect their long-term persistence over decades and/or continual pathogen exposure.
- The cumulative encounter of different antigens over the course of a human lifetime may be the cause of TRM persistence in various places. The study of various diseases, from infection to cancer to inflammation and autoimmune disease, is becoming increasingly popular as a result of TRM.
Learn more about the Memory T cells with the help of the given link:
brainly.com/question/23423029
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