Q. No.For the stability of the organic compounds, Oparin opined that, probably:
1.
UV radiation never reached the surface of the primeval Earth
2.
the primeval Earth was in a molten state
3.
the primeval Earth atmosphere was reducing rather than oxidizing
4.
plenty of energy sources were available for chemical reactions to occur
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
What is genetic equilibrium?
| 1. | When all the alleles of a gene are present in a population in equal frequencies |
| 2. | When the number of heterozygotes in a population is equal to the number of either of the homozygote. |
| 3. | When the number of heterozygotes in a population is equal to the number of either of the homozygote. |
| 4. | When the frequency of particular genes or alleles remains constant in a population through generations |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Gene flow is :
| 1. | the emergence of new species from pre-existing species |
| 2. | the exchange of genes during fertilization |
| 3. | mating between close relatives |
| 4. | the movement of genes between species populations |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Genetic drift is :
| 1. | random changes in gene frequency in a population |
| 2. | generational fluctuations in gene frequencies that produce no effect |
| 3. | changes due to interbreeding with other species populations |
| 4. | the effect of mutations as they spread through neighbouring populations |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Which one of the following would cause the Hardy-Weinberg principle to be inaccurate?
| 1. | The size of the population is very large. |
| 2. | Individuals mate with one another at random. |
| 3. | Natural selection is present. |
| 4. | There is no source of new copies of alleles from outside the population. |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The theory of spontaneous generation stated that:
| 1. | life arose from living forms only |
| 2. | life can arise from both living and non-living |
| 3. | life can arise from non-living things only |
| 4. | life arises spontaneously, neither from the living nor from the non-living |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Palaeontological evidence for evolution refers to the:
| 1. | development of the embryo | 2. | homologous organs |
| 3. | fossils | 4. | analogous organs |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Analogous organs arise due to:
| 1. | divergent evolution | 2. | artificial selection |
| 3. | genetic drift | 4. | convergent evolution |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
1. Sedimentary rocks
2. Igneous rocks
3. Metamorphic rocks
4. Any type of rock
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
For the MN-blood group system, the frequencies of M and N alleles are 0.7 and 0.3, respectively. The expected frequency of MN-blood group-bearing organisms is likely to be:
| 1. | 42% | 2. | 49% |
| 3. | 9% | 4. | 58% |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
© 2025 GoodEd Technologies Pvt. Ltd.