Vaccines work by priming the immune system and inducing the formation of antibodies and memory cells. When the actual virus infects the host, the host's immune system recognizes and responds to it. What feature(s) of HIV allow it to thwart this system, making a vaccine difficult
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Biology, 22.06.2019 03:00
Which sentence best describes the relationship between chlorophyll and the chloroplast? a.) chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.
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Biology, 22.06.2019 09:00
Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.
Answers: 3
Biology, 22.06.2019 11:00
Which measure of an earthquake depends on how close you are to the focus?
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Biology, 22.06.2019 12:30
This is collection of data made by comparing objects in standard units. in science, the units are metric.
Answers: 3
Vaccines work by priming the immune system and inducing the formation of antibodies and memory cells...
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