With Electron Microscopes,researchers Have Found a Group of Bacteria to Have

question 39

Multiple Choice

With electron microscopes,researchers have found a group of bacteria to have folded membranes resembling thylakoids.The membranes contain molecules similar to those in plant chloroplasts,allowing photosynthesis to take place.A likely explanation for the similarity of the membrane in bacterial cells is that

• A) these bacteria share similar genetic controls, regulating the formation of the folded membranes, with plants.
• B) these bacteria share structure and molecules, but could not be expected to do photosynthesis without specialized compartments.
• C) these bacteria should be reclassified as eukaryotes, since they share the thylakoid membrane and molecules with plants and protists.
• D) these bacteria fully evolved to have membrane-bound organelles, like the eukaryotes.

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Definitions:

Confidence Interval

A span of numbers, obtained from sampling data, which is expected to encompass the value of an unspecific population characteristic, given a certain confidence level.

Population Total

The sum of all observations or values in a given population set.

T-Statistic

A type of test statistic used in hypothesis testing when the sample size is small and the population variance is unknown.

Z-Statistic

A score that expresses the number of standard deviations an element is from the mean of the population.