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Biology, 31.01.2020 20:51, rndschopplein
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a scientist attempts to determine the effect of varying concentrations of ammonia on a bacterial culture. several cultures of the
same species of bacteria were grown in culture tubes, each with a different concentration of ammonia. the cultures were
incubated (kept in a warm, safe environment) and after 24 hours the cultures were examined for bacterial growth.
to improve this experimental design, the scientist should have included a control group which
a
contained no ammonia
b
contained no bacteria
с
was not incubated
d
was incubated at room temperature
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Biology, 21.06.2019 20:10, wafflewarriormg
4. how does a phospholipid behave in water? the phosphate head does not mix with water; the fatty acid tails do. the phosphate head and the fatty acid tails mix with water. the phosphate head and the fatty acid tails do not mix with water. the phosphate head mixes with water; the fatty acid tails do not.
Answers: 1
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The importance of the mind as a part of the body is an example of:
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Biology, 22.06.2019 14:00, michellemonroe012305
True or false: (a) the strings of little red dots represent carbohydrates. (b) the model is called a bilayer because there are two main types of molecules present, lipids and proteins. (c) the many black lines represent amino acid tails. (d) this model shows membrane transport. (e) the blue ovals are hydrophobic. (f) the blue ovals represent phospholipid heads.
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