Q. No.The most critical evolutionary process, that leads to changes in allele frequencies and favors or promotes adaptation as a product of evolution, is :
1. Genetic drift 2. Gene migration 3. Mutation 4. Natural selection
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
The differential success in the reproduction, of an organism, in a given environment, is :
| 1. | Adaptation | 2. | Natural Selection |
| 3. | Adaptive radiation | 4. | Saltatory evolution |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
A population geneticist finds that a new allele in a population has suddenly increased in frequency. Most likely this allele is:
1. mutating rapidly
2. flowing with emigrants
3. strongly selected for
4. a product of assortative mating
An island population faced a natural calamity and the population crashed to only 30 organisms. After some time the number of organisms grew to 5000 but still the threat of extinction is large. This is most likely due to:
| 1. | Founder effect | 2. | Bottleneck effect |
| 3. | Edge effect | 4. | Heterosis |
The number of individuals expressing the dominant phenotype in a population of 200 is 182. What is the frequency of the dominant allele in this population?
| 1. | 9 % | 2. | 30 % |
| 3. | 91 % | 4. | 70 % |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
In some African populations, the frequency of the sickle cell allele in the human population is much higher than normal. This can be an example of:
| 1. | gene flow | 2. | heterozygote advantage |
| 3. | genetic drift | 4. | nonrandom mating |
If you visit Africa you will find an amazing variety of species of living organisms. But you will also notice that different parts of the continents have different biodiversity. This is because the different areas of Africa will have different:
| 1. | evolutionary mechanisms | 2. | ancestors |
| 3. | environments | 4. | evolutionary times |
For differential success in reproduction, all the following must be present except:
| 1. | Gene flow between populations. |
| 2. | Variations must be genetically inherited. |
| 3. | Certain variations allow an individual to produce more offspring that survive in the next generation. |
| 4. | There must be variations in the phenotypes of individuals. |
Identify the correct statement:
| 1. | As the coacervates do not have lipid outer membranes and cannot reproduce, they alone could not have been the precursors of life. |
| 2. | The microspheres could not be induced to constrict but had a large amount of diversity. |
| 3. | The earliest life was probably not driven by solar energy as is seen today. |
| 4. | Protobionts cannot separate a combination of molecules from the surroundings or maintain an internal environment, but are able to reproduce. |
Which of the following statements is incorrect regarding an evolutionary trend?
| 1. | It is the continuous change of a character within an evolving lineage. |
| 2. | The number of trends in any lineage is the same as the number of characters evolving. |
| 3. | A trend may be progressive or retrogressive. |
| 4. | Direction and speed of evolutionary trends in a lineage are universal throughout the family and are not subject to variations. |
© 2024 GoodEd Technologies Pvt. Ltd.