Explanation:
Every individual has the same negative effect on population growth rate, independent of density.
Lymphocytes that destroy foreign cells or virus- infected cells are cytotoxic T cells.
<h3>What is cytotoxic T cell?</h3>
- A particular class of immune cell that is capable of eliminating specific types of cells, such as virus-infected cells, cancer cells, and alien cells.
- To destroy cancer cells, cytotoxic T lymphocytes can be isolated from other blood cells, cultured in a lab, and then administered to a patient.
- White blood cells and lymphocytes both fall under the category of cytotoxic T lymphocytes.
- It is also known as a killer T cell and a cytotoxic T cell.
- The helper T cell and the cytotoxic T cell are the two main subtypes of T cells.
- Helper T cells, as their names imply, "assist" other immune system cells, whereas cytotoxic T cells "kill" virally-infected cells and tumours.
- The TCR cannot directly bind antigen, unlike an antibody.
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Das Fortpflanzungssystem ist eine Sammlung von inneren Organen und äußeren Genitalien, die zusammenarbeiten, um neues Leben zu erzeugen. Das weibliche Fortpflanzungssystem besteht aus verschiedenen Teilen, insbesondere der Vagina, der Gebärmutter und den Eierstöcken, die Eier produzieren
Increase in the atmospheric oxygen led to the development of microbe metabolism.
<u>Explanation:</u>
Earth's initial air and seas were without free oxygen, despite the fact that small cyanobacteria were delivering the gas as a side-effect of photosynthesis. At that point, about 2.4 billion years back, oxygen in the climate unexpectedly expanded by around multiple times in only 200 million years.
Atmospheric oxygen resulted from a change to a microbe's metabolism that evolved once, at a specific time in the earth's history
