In order to be able to respond to the vast number of antigens present in the environment, which the body might encounter, the lymphoid system has populations of cells with ________.
Fill in the blank(s) with the appropriate word(s).
varied antigen sensitivities
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Both chemical and mechanical digestion start in the mouth and continue in the stomach.
Answer the following statement true (T) or false (F)
Interleukins are chemical signals by which immune cells communicate with each other
Indicate whether the statement is true or false
Which statements are true regarding the discovery of the double helix of DNA? select all that apply.
a) Watson, Crick, Wilkins and Franklin received in 1962 the Nobel prize for their work on DNA b) Rosalind Franklin's X-ray diffraction showed that the DNA is a helix c) Watson and Crick published their findings on the structure of the dNA without performing any experiments of their own