This is an MCQ-based quiz for GRE on the topic of Evolution, Mutations, and Speciation.
Speciation can be driven by evolution, which is a process that results in the accumulation of many small genetic changes called mutations in a population over a long period of time. There are a number of different mechanisms that may drive speciation.
Which type of mutation creates a premature stop codon in the mRNA?
Sickle cell anemia is a disorder caused by the alteration of one amino acid in hemoglobin. Based on this, what kind of mutation causes sickle cell anemia?
What term best describes when one species exhibits two or more defined phenotypes within the same population?
Which of the following is most accurate about single nucleotide polymorphisms (SNPs)?
Which of the following is an example of convergent evolution?
Which of the following refers to speciation that results from physical barriers such that biological populations become isolated?
Which of the following refers to speciation that occurs due to reproductive isolation in populations that occupy the same geographical area?
A scientist studies three populations of frog (populations A, B, and C) that live in the same rainforest. He notices some interesting similarities between the three groups. What would be the best evidence that A and B have a more recent common ancestor than A and C or B and C?
Phylogenetics relates organisms to one another based on genetic distance that increases with evolutionary time. This principle requires the use of what kind of genes in order to give accurate relationships?
A __________ mutation always results in the ribosome encountering a premature stop codon.
A certain class of protein is found to exist in several different species. The amino acid sequence of this protein is compared between a large number of species. The greatest number of amino acid differences will be found between species of different __________.
An example of __________ is the speciation of Darwin"s finches through the accumulation of many small, distinct traits.