The relationship between the bee and the bacteria living in the bee's gut can be classified as ___
a. parasitism
b. commensalism
c. a disease
d. mutualism
e. suicidal
Answer: d. mutualism
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An animal's circulatory system contains ____
a. solid medium to transport nitrogen b. blood vessels for transporting solid food c. blood vessels leading to the heart d. a mouth opening to the outside e. nitrogen to transport wastes
Animal models such as the ____________________ and ____________________ are being studied to identify single
genes that control aspects of learning, memory, and spatial perceptionFill in the blank(s) with the appropriate word(s).
Pyelonephritis may result from
A) urethritis. B) cystitis. C) ureteritis. D) systemic infections. E) All of the answers are correct.
Secondary lymphoid tissues
A) are neutrophils and eosinophils. B) are monocytes and dendritic cells. C) are where formed elements in blood are produced. D) filter lymph and sample surrounding body sites for antigens which are brought into contact with the leukocytes that reside in secondary lymphoid tissues to stimulate an immune response. E) are where leukocytes mature.