The lymphoid tissues of the intestinal tract are collectively referred to as ________.
A. lymph nodes
B. the thymus
C. the spleen
D. GALT
E. tonsils
Answer: D
Biology & Microbiology
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____ tissue allows the body to detect and respond to internal and external changes
a. Nervous b. Adipose c. Epithelial d. Connective e. Skeletal muscle
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The atrioventricular valves are closed when the
A) right atrium is contracting. B) P wave of an electrocardiogram appears. C) heart is completely relaxed. D) ventricles contract. E) ventricles are relaxed.
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Microevolution is a change in ____ frequencies within a population over time.
Fill in the blank(s) with the appropriate word(s)
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