Biology, 05.07.2019 12:30 faithkristi
Select all the correct answers. serena is a research student who has conducted an experiment on the discoloration of marble. read about serena’s experiment. then identify two flaws in her experiment’s design. serena sees an article about the taj mahal, a medieval marble monument in india. she reads that the white monument is beginning to turn a dull yellow-brown. serena admires the taj mahal and is eager to learn what might be causing the yellowing. she formulates a hypothesis that the yellow-brown tinge may be caused by air pollution from black carbon, brown carbon, or methane, combined with wind erosion. to test her hypothesis, she decides to study the effects of these air pollutants and wind on white marble. she finds three identical pieces of white marble and exposes one of them to air containing black carbon, one to air with brown carbon, and one to air with methane. she also places a fan on two of the samples, varying the speed of the air stream in regular intervals. after a few days, the marble samples begin changing color, becoming grayish. serena learns that air pollution caused the discoloration. however, she is not sure how it became gray instead of yellow and what exactly caused the discoloration. 1 she used identical pieces of marble for her samples. 2 she introduced at least one confounding variable. 3 she tried to test multiple hypotheses at a time. 4 she attributed the marble discoloration to wind erosion. 5 she used a mechanically-generated air stream rather than natural winds.
Answers: 1
Biology, 21.06.2019 23:30
New york city has 2,181 inhabitants per square mile. the state of alaska has 1.03 inhabitants per square mile. ecologists would say alaska has a low exponential growth population density birth rate carrying capacity
Answers: 1
Biology, 22.06.2019 05:30
Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.
Answers: 1
Biology, 22.06.2019 15:30
Choose the diagram that best represents a habitat corridor explain your choice.
Answers: 2
Select all the correct answers. serena is a research student who has conducted an experiment on the...
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