“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 |
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 |
Which theory, regarding the origin of life, is alternatively also called “panspermia”?
1. | Special Creation | 2. | Spontaneous Generation |
3. | Cosmozoan Theory | 4. | Biochemical Evolution |
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 |
The “Biogenetic Law” was given by :
1. | von Baer | 2. | Ernst Haeckel |
3. | Hugo de Vries | 4. | Theodosius Dobzhansky |
The wings of birds, the forelegs of a horse, and the upper limbs of humans are:
1. | analogous structures | 2. | homologous structures |
3. | vestigial structures | 4. | phylogenetic structures |
Which of the following types of natural selection reduces variation but does not change the mean value?
1. | directional | 2. | stabilizing |
3. | disruptive | 4. | all of these |
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 |
According to Oparin, which one of the following was not present in the primitive atmosphere of the earth?
1. | Oxygen | 2. | Hydrogen |
3. | Water vapour | 4. | Methane |
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 % |