The presence of palpable lymph nodes.
Lymph nodes are relatively large in children, and the supperficial ones often are palpable even when the child is healthy.
<u>changes </u><u>in </u><u>abiotic </u><u>factors</u> is the most appropriate answer for this question.
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(by Benjemin)
Cell Differentiation<span> and Tissue. Within multicellular organisms, tissues are organized communities of </span>cells<span>that </span>work together<span> to carry out a specific function. The exact role of a tissue in an organism depends on what types of </span>cells<span> it contains.</span>
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