Positive selection tests to see if the TCR of a T-lymphocyte can recognize and bind to an MHC molecule.
<h3>What is a T-lymphocyte?</h3>
A T-lymphocyte is a special type of immune cell that is generated inside the bone marrow.
The T-cell receptor (abbreviated as TCR) is a protein located on these immune T lymphocytes.
In conclusion, Positive selection identifies if the TCR of a T-lymphocyte can recognize and bind to an MHC molecule.
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ACTH and TSH
Source: http://www.juniordentist.com/hormones-released-from-pituitary-gland-and-their-functions.html
Answer:
signaling processes
Explanation:
Neurons within the brain are constantly processing and transmitting information. Electrical impulses that pass from one neuron to another consume a lot of energy. So, sending, receiving and processing the signals are the main events of brain energy expenditure. Neurons also use the energy for the maintenance of themselves and the surrounding glial cells.
Glucose is the main energy source in the brain.
The reason for this change is "Technological advances led to the discovery of single-celled organisms and increased our understanding of relationships between organisms"
<h3>Why bacteria and archaea should be classified into different kingdoms?</h3>
Archea and bacteria are both prokaryotic organisms ( organisms without defined organelles and nucleus) that share common features such as a similar morphology and similar ways to obtain food/energy. However, these organisms have important differences such as RNA type, they have a slightly different morphology and they live in different habitats.
<h3>Why did this change in classification occurred?</h3>
This change occurred due to technological advances. Indeed, the classification of organisms into 4 kingdoms occurred by the beginning of the 20th century when unicellular prokaryotic organisms had not been completely studied, and therefore it has not been determined this group included two sub-groups.
Learn more about organisms in: brainly.com/question/12825206
