Answer: The correct answer is D
C Hypertonic
Explanation:
The circumference of earth is 24,901 mi
The right answer is D) 9 groups of 3 microtubules
Centrioles are the constituents of a so-called centrosome structure: every animal cell has a centrosome, which is made of two centrioles and which together form a functional unit. A centriole consists of nine triplets inclined microtubules, surrounded by a number of proteins.
An ecosystem is a community where populations of different species interact with one another and with their non-living environment.
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.
Learn more about cytotoxic T cell here:
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