An antigen is a biomolecule, such as a protein or sugar, that binds to a specific antibody. An antibody/antigen interaction may stimulate an immune response. Not every biomolecule is antigenic and not all antigens produce an immune response. B cells are the major cell type involved in the humoral immune response.
The key biomolecule involved in the immune system is a protein known as an antibody. These are produced by B cells and help the immune system recognize and destroy foreign substances like bacteria or viruses.
The biomolecule that has significant involvement in the immune system is a group of proteins known as antibodies or immunoglobulins. These antibodies are produced by certain types of white blood cells (B cells). They play a crucial role in the immune response by recognizing and binding to specific antigens such as bacteria or viruses, enabling other parts of the immune system to destroy these foreign substances more effectively. For example, if a person becomes infected with a virus, the immune system will produce antibodies specific to that virus. Once these antibodies attach to the virus, they basically mark it for destruction by other cells in the immune system.
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Answer:
Metaphase
Explanation:
The M phase of the cell cycle is the phase during which the nuclear content and cellular content is distributed. The distribution of the nuclear content takes place in four phases: prophase, metaphase, anaphase and telophase.
The homologous chromosomes are aligned at the equatorial plate during the metaphase after which the chromosomes separate. The phase during which the separation of the chromosomes takes place is known as anaphase so the phase before the anaphase is the phase during which the chromatids are not separated that is the metaphase.
Thus, metaphase is the correct answer.
In mitosis, the last phase where chromatids are together is the metaphase. After this, during the anaphase, sister chromatids separate and move towards opposite poles.
In mitosis, the last phase where chromatids are together is the metaphase. During this stage, chromosomes line up across the centre of the cell and each chromosome is connected to a spindle fibre at its centromere. This ensures equal division of chromosomes into each of the two new cells. After the metaphase, during anaphase, the centromeres of each chromosome separate and the sister chromatids move away from each other towards opposite poles.
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Tides are not caused by the moon.
Tides are caused by the location of the Earth, sun, and moon.
The sun is not involved in causing tides.
Answer:
6) False
Explanation:
No, it's not true, because species richness refers to the total number of species present within a particular community or ecosystem, regardless of their trophic level. Trophic level is a measure of an organism's position in its food web or nutrient cycle, and it is not directly related to species richness.