Q. No.The natural selection operating as shown in the given figure is called as:
1.
Disruptive
2.
Directional
3.
Stabilizing
4.
Retrogressive
Similar biological structures or sequences in different taxa are homologous if they:
| 1. | always perform the same function |
| 2. | result from convergent evolution |
| 3. | do not serve any known function |
| 4. | are derived from a common ancestor |
All the following are examples of evolution by anthropogenic action except:
| 1. | Industrial melanism seen in peppered moth |
| 2. | Pesticide resistance in pests |
| 3. | Emergence of antibiotic resistant bacteria |
| 4. | Streamlined body in dolphins |
The process of evolution of different species in a given geographical area starting from a point and literally radiating to other areas of geography [habitats] is known as:
| 1. | Convergent evolution | 2. | Divergent evolution |
| 3. | Adaptive radiation | 4. | Artificial selection |
When a new population is established by a very small number of individuals from a larger population, sometimes becoming a different species, the process is called as:
| 1. | Founder effect | 2. | Genetic bottleneck |
| 3. | Adaptive radiation | 4. | Convergent evolution |
Assume that 4 % of people in a population are born with sickle cell anemia [Sickle cell anemia is autosomal recessive]. What percentage of individuals will have the selective advantage of the sickle-cell trait?
| 1. | 16 % | 2. | 32 % |
| 3. | 36 % | 4. | 96 % |
A thorn of Bougainvillea and a tendril of Cucurbita are an example of :
| 1. | analogous organs | 2. | vestigial organs |
| 3. | homologous organs | 4. | defense organs |
Which theory, regarding the origin of life, is alternatively also called “panspermia”?
| 1. | Special Creation | 2. | Spontaneous Generation |
| 3. | Cosmozoan Theory | 4. | Biochemical Evolution |
Industrial melanism is an excellent example of ‘evolution in action’ where the selecting agent is:
| 1. | humans | 2. | toxins from smoke |
| 3. | birds | 4. | tree bark |
“Organisms that share common descent show underlying embryological patterns on which they build later their adult patterns”. This is :
| 1. | Haeckel’s law | 2. | Baer’s law |
| 3. | Gauss law | 4. | Allen’s rule |
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