Based on the data provided in part A of the passage, there are parasite load decreases followed by increases. Justify how trypanosome biology and features of the immune system could interact to result in this varying parasite load. A. As one glycoprotein variant becomes recognized and attacked by the adaptive immune system, another glycoprotein that is not yet recognized is able to persist. B. The longer the glycoprotein variants persist in the body, they attack and impair the immune system over time. C. As both glycoprotein variants become recognized by the innate immune system, the parasite load levels fall until the immune system can no longer detect the parasite, which allows the trypanosome to thrive. D. As antibody levels increase, the parasites with the associated glycoprotein variant are able to evade detection by the adaptive immune system.
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Biology, 22.06.2019 06:30, alandrabell9234
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Biology, 22.06.2019 09:10, ballin4534
Refer to this portion of a dichotomous key for fish identification to answer the question. 1. (a) has a single dorsal fin ® 5 (b) has a double dorsal fin ® 2 2. (a) one fin is spiny, the other is smooth ® 3 (b) one fin is not spiny or smooth ® 4 5. (a) has small fin on back near tail ® 6 (b) has no fin on back near tail ® 7 6. (a) has barbs near the mouth ® catfish (b) does not have barbs near the mouth ® 10 7. (a) tail is asymmetrical ® 8 (b) tail is symmetrical ® 9 10. (a) scales are small ® trout (b) scales are large ® whitefish what is the next step to complete to identify a fish that has a single dorsal fin, no fin on the back near the tail, and no barbs near the mouth? step 2 step 5 step 7 step 10
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