While the ________ is protected by the lymphatic system, it is not part of the lymphatic system.
A. skeletal muscle
B. tonsil
C. spleen
D. pancreas
E. thymus
D. pancreas
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Based on the tree shown above, a grouping composed of Species A, Species, B and Species D only is considered:
A. paraphyletic. B. polyphyletic. C. monophyletic. D. sister groups. E. None of the of the answer options is correct.
In which phase of mitosis are the chromosomes lined up on the equator?
a. anaphase b. prophase c. cytokinesis d. telophase e. metaphase
You have developed an antibiotic that inhibits a bacterial enzyme critical for the formation of the cell wall. However, after only a short time, the bacteria become resistant to the antibiotic, and it's no longer effective
Which mechanism is responsible for the bacteria no longer being sensitive to your antibiotic? A) Over time, your antibiotic selected for bacteria containing a gene that codes for an enzyme capable of metabolizing your antibiotic. B) The bacteria learned to avoid taking up the antibiotic in their surroundings. C) The immune system of bacteria recognized the antibiotic as being foreign and quickly removed any antibiotic before it could accumulate to toxic levels. D) Through the use of plasmids, bacteria communicated with other bacteria that a noxious chemical was present in the environment.
The epiglottis forms a lid over the larynx when we swallow food: it closes off the respiratory passageway to incoming food or drink.
Answer the following statement(s) true (T) or false (F)