st defines evolution as it is studied in the discpline of populatin genetics? (P
ID: 96024 • Letter: S
Question
st defines evolution as it is studied in the discpline of populatin genetics? (Points 2) change in the allele frequency of a gene or genes in a population creation of genetic diversity within a population process of differential survivial and reproduction resulting in population change over time O change in species over time O change in taxonimoc groups over long periods of time 2. Which of the following situations will lead to natural selection? (Points : 2) O Male lions compete for the right to mate with females, with only one possible winner O all of the above O The seeds of two plants land near each other and one grows larger than the other. Two types of fish eat the same kind of food and one is better able to gather food than the otherExplanation / Answer
The answer of question 3. Is 1 because in this the difference is stated by comparing the level of evolution at population level.
In option 2, the evolution is defined at organism level but in microevolution and macroevolution the evolution takes place between population of same species (microevolution) and more than one population of different species (macroevolution). In option 3 and 4, the microevolution does not mean microscopic evolution or taking place in small organism; microevolution means the level of evolution is small as evolutionary process can take many years, in microevolution we studies the changes within population of same species and macroevolution does not mean it is taking place in complete organsims or large organsims like human or elephant; macroevolution is the evolution taking place over long period of time within various populations of different species. hence, option 2, 3 and 4 are incorrect.
In option 1, the comparison of microevolution and macroevolution is at same level so that they can be differentiated easily. The difference in microevolution and macroevolution is that microevolution takes place in population of same species for a short period of time whereas the macroevolution takes place in multiple populations over a long period of time also resulting in formation of new species. Example of microevolution is moth color change due to industry and of macroevolution the evolution of tetrapods from fish.
Hence, option 1 is the correct answer.
The correct answer of question 4. Is 3 because mutation and gene flow are evolutionary processes involved in genetic variation in a population.
In options, 1, 2 and 4 the genetic variation is there in the natural selection, gene flow and genetic drift. But, the genetic variation in natural selection will not be there if the individual is adapted to the environmental changes or very low amount of variation. In case of genetic drift, if the relative frequency of the genotype is not different due to random sampling there will be less chances of a new genetic variation.
Hence, the options 1, 2 and 4 are incorrect.
Mutation are very random and have high rate of genetic variation in evolutionary processes because even a single mutation can result into major evolutionary change. The flow of gene from one population to another also causes genetic variation. The chances of new genetic variations are high in mutation and gene flow.
Hence, option 3 is the correct answer.
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