MCQOPTIONS
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MCQOPTIONS
This section includes 67 Mcqs, each offering curated multiple-choice questions to sharpen your SRMJEEE knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The first green plants and fungi appeared on land during which period? |
| A. | Ediacaran period |
| B. | Devonian period |
| C. | Orosirian period |
| D. | Ordovician period |
| Answer» C. Orosirian period | |
| 52. |
During which geological period did the earth become oxygen rich? |
| A. | Orosirian period |
| B. | Ediacaran period |
| C. | Devonian period |
| D. | Ordovician period |
| Answer» B. Ediacaran period | |
| 53. |
Balancing selection is concerned with successful reproduction of |
| A. | Homozygous recessives |
| B. | homozygous indivduals |
| C. | heterozygous individuals |
| D. | all of the above |
| Answer» D. all of the above | |
| 54. |
Which one is used for knowing whether or not a population is evolving? |
| A. | Degree of evolution |
| B. | Genetic drift |
| C. | Proportion between acquired variations |
| D. | Hardy Weinberg equation |
| Answer» E. | |
| 55. |
Lamarck theory of organic evolution is usually known as |
| A. | Natural selection |
| B. | Inheritance of acquired characters |
| C. | Descent with change |
| D. | continuity of fermplasm |
| Answer» C. Descent with change | |
| 56. |
In which condition gene ratio remains constant in a species? |
| A. | gene flow |
| B. | mutation |
| C. | random mating |
| D. | sexual selection |
| Answer» D. sexual selection | |
| 57. |
Which is related to reproduce isolation |
| A. | genetic isolation |
| B. | temporal isolation |
| C. | behavioural isolation |
| D. | all of these. |
| Answer» E. | |
| 58. |
Genetic drift is found in |
| A. | Small population with or without mutated genes |
| B. | large population with random mating |
| C. | plant population |
| D. | animal population |
| Answer» B. large population with random mating | |
| 59. |
Quick change in phenotypes in a small band of colonisers is called |
| A. | Founder effect |
| B. | Genetic bottle neck |
| C. | Genetic grift |
| D. | Gene flow |
| Answer» B. Genetic bottle neck | |
| 60. |
Sympatric speciation develops reproductive isolation without |
| A. | Geographic barrier |
| B. | barrier to mating |
| C. | barrier to gene flow |
| D. | genetic change |
| Answer» B. barrier to mating | |
| 61. |
According to Neo- Darwinism, natural selection operates through |
| A. | Fighting between organisms |
| B. | Variations |
| C. | Killing weaker organism |
| D. | Differential reproduction |
| Answer» E. | |
| 62. |
Genetic drift is on account of |
| A. | variations |
| B. | mutation |
| C. | increase in population |
| D. | decrease in population |
| Answer» E. | |
| 63. |
The evolution of a species is based upon sum total of adaptive changes preserved by |
| A. | natural selection |
| B. | isolation |
| C. | speciation |
| D. | human conservation |
| Answer» C. speciation | |
| 64. |
The theory of use and disuse was given by |
| A. | Stebbins |
| B. | Lamarck |
| C. | Aristotle |
| D. | Vavilox |
| Answer» C. Aristotle | |
| 65. |
Mutation may be described as |
| A. | Continuous genetic variation |
| B. | Phenotypic change |
| C. | Discontinuous genetic variation |
| D. | change due to hybridisation |
| Answer» D. change due to hybridisation | |
| 66. |
According to De Vries theory, evolution is |
| A. | jerky |
| B. | discontinuous |
| C. | continuous and smooth |
| D. | both a and b |
| Answer» C. continuous and smooth | |
| 67. |
A species inhabiting different geographical areas is known as |
| A. | sympatric |
| B. | allopatric |
| C. | sibling |
| D. | biospecies |
| Answer» C. sibling | |