Please select characteristics exhibited by prokaryotes to test your understanding of the differences between prokaryotic and eukaryotic organisms.
> DNA
> Nucleus
> Golgi body
> Ribosomes
> Cell wall
> DNA
> Ribosomes
> Cell wall
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If genetic drift is not accompanied by natural selection, mutation, or migration, then the frequencies of alleles will "wander" between 0 and 1. Using the accompanying figure, which of the following is an accurate statement?
A) Random sampling error generates fluctuations in allelic frequencies over generations, so all populations—both simulated and real—have been found to follow the same evolutionary trajectory. B) The effects of genetic drift are more immediate, and more pronounced, on small population sizes. C) Genetic drift will have no long-term effect on allelic frequencies if the population numbers more than 40 individuals. D) None of these is an accurate statement.
Which sequence represents the pattern of energy flow within an ecosystem?
a. producers ? consumers ? decomposers b. decomposers ? producers ? consumers c. consumers ? producers ? decomposers d. decomposers ? consumers ? producers e. producers ? decomposers ? consumers
Recent evidence suggests that hydrogenosomes and mitochondria evolved from different endosymbiotically derived organelles.
Answer the following statement true (T) or false (F)
Which of the following molecules is least likely to be able to pass through a capillary wall?
A) an enzyme B) a sodium ion C) glucose D) oxygen