The “Biogenetic Law” was given by :
1. | von Baer | 2. | Ernst Haeckel |
3. | Hugo de Vries | 4. | Theodosius Dobzhansky |
“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 |
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 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 |
Statement I: | They evolved in a similar environment, rather than inherited from a recent common ancestor. |
Statement II: | They have a common descent and have evolved from a shared ancestor. |
1. | Statement I is correct; Statement II is incorrect |
2. | Statement I is correct; Statement II is correct |
3. | Statement I is incorrect; Statement II is correct |
4. | Statement I is incorrect; Statement II is incorrect |
Which type of selection explains industrial melanism observed in moth, Biston betularia?
1. | Stabilising | 2. | Directional |
3. | Disruptive | 4. | Artificial |
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 |
I: | Nature selects for fitness. |
II: | Fitness is based on characteristics that are inherited. |
III: | Fitness is the end result of the ability to adapt and get selected by nature. |
1. | Only I and II | 2. | Only I and III |
3. | Only II and III | 4. | I, II and III |
1. | Branching descent and natural selection |
2. | Saltation and Catastrophism |
3. | Use and disuse of organs and inheritance of acquired traits |
4. | Reproductive isolation and Founder effect |
Some of the marsupials of Australia resemble equivalent placental mammals that live in similar habitats on other continents. This is an example of:
1. | Convergent evolution | 2. | Divergent evolution |
3. | Saltatory evolution | 4. | Adaptive radiation |