Answer the following questions true (T) or false (F)
1. Trypanosoma brucei is transmitted to animals and people by a bloodsucking fly.
2. Rabies is a rare zoonosis in humans but common in many other species of mammal.
3. Fungi rarely infect the central nervous system.
1. TRUE
2. TRUE
3. TRUE
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Predict the result when a phosphate-containing chemical is released by a factory into a pond
A) All living things will always die in such cases. B) Eutrophication will occur. C) Climax species will invade. D) Predatory fish will increase in population faster than other living things.
Which sequence presents the five steps of digestion in an upper-level animal in the proper order?
a. mechanical processing, secretion of enzymes, absorption, enzymatic hydrolysis, elimination b. mechanical processing, absorption, secretion of enzymes, enzymatic hydrolysis, elimination c. mechanical processing, secretion of enzymes, enzymatic hydrolysis, absorption, elimination d. absorption, enzymatic hydrolysis, mechanical processing, secretion of enzymes, elimination
In which organ are T-lymphocytes finally matured?
A. Lymph nodes B. Bone marrow C. Spleen D. Thymus E. Tonsils
Comparing the evolution of domesticated dogs to the evolution of wolves over the same time period illustrates what relationship between artificial and natural selection?
A. In artificial selection, the magnitude of the selection pressure can be varied; in natural selection, it cannot. B. Artificial selection is more likely to produce maladaptive structures than natural selection. C. Artificial selection is slower than natural selection. D. Artificial selection cannot produce changes as large as changes produced by natural selection. E. Artificial selection is reversible; natural selection is not.