Answer the following questions true (T) or false (F)

1. Lymph "glands" (nodes) swelling is a sign that an infection is present.

2. Antibodies are produced by plasma cells and regulatory T cells.

3. B cells are the main cells of the cell-mediated pathway.


1. TRUE
2. FALSE
3. FALSE

Biology & Microbiology

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Two similar species with different habitat preferences are isolated by ____ isolation. 

A. reproductive B. ecological C. behavioral D. seasonal

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Name one of the smallest, if not the smallest, animals that are sometimes referred to as "wheel animalcules."

A. planaria B. parasitic mites C. fruit flies D. rotifers E. parasitic

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In addition to abiotic factors, community composition of plants can be severely compromised by

A) parasites and pathogens. B) mutualistic birds. C) rapid coevolution.

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