Do no not solve. Just state is this an example of a log linear analysis, ancova

Question

Do no not solve. Just state is this an example of a log linear analysis, ancova or goodness of fit ?
Researchers have long known that sponges, when filtering planktonic particles, prefer bacteria-sized particles but do they select different types of bacteria over others. Therefore, a study was conducted in which 40 aquaria were filled with seawater and water samples taken before and after a sponge was placed in each aquarium and permitted to feed for 40 minutes. Water samples were filtered, DNA extracted, and Denaturing Gradient Gel Electrophoresis was conducted to assess the change in the bacterial community composition caused by sponge feeding - think of it as a molecular measure of “species diversity”. One can tell if sponges preferentially filtered some types of bacteria over others by noting the pattern of the presence or absence of DNA fragment bands on the final gels. Is there a significant difference in the pattern of DNA fragment distribution at these four gel band locations before and after sponges have been allowed to feed on the plankton? Do no not solve. Just state is this an example of a log linear analysis, ancova or goodness of fit ?
Researchers have long known that sponges, when filtering planktonic particles, prefer bacteria-sized particles but do they select different types of bacteria over others. Therefore, a study was conducted in which 40 aquaria were filled with seawater and water samples taken before and after a sponge was placed in each aquarium and permitted to feed for 40 minutes. Water samples were filtered, DNA extracted, and Denaturing Gradient Gel Electrophoresis was conducted to assess the change in the bacterial community composition caused by sponge feeding - think of it as a molecular measure of “species diversity”. One can tell if sponges preferentially filtered some types of bacteria over others by noting the pattern of the presence or absence of DNA fragment bands on the final gels. Is there a significant difference in the pattern of DNA fragment distribution at these four gel band locations before and after sponges have been allowed to feed on the plankton? Do no not solve. Just state is this an example of a log linear analysis, ancova or goodness of fit ?

Explanation / Answer

The difference in the pattern of DNA fragment distribution at the four gel band locations before and after sponges have been allowed to feed on the plankton is an example of ANCOVA

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