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Earn 100

Which one of the following is the first step in allopatric speciation?
(a)Polyploidy
(b)Geographic isolation
(c)Hybridization
(d)Genetic drift

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Important Questions on Genetics & Organic Evolution
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List -I | List -II | ||
(A) | Founder effect | (I) | Long necked giraffes |
(B) | Bottleneck effect | (II) | Heterozygous for sickle cell anaemia |
(C) | Genetic load | (III) | Pitcairn Island human population |
(D) | Directional selection | (IV) | Polydactylic dwarf individuals |
(V) | Sunflower population in California |
The correct answer is

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(A) Rennin is industrially produced by Mucor pusillus.
(B) Streptokinase is industrially produced by Pseudomonas putida.
(C) Alkaline serine protease is produced by Bacillus licheniformis
(D) polymerase is produced by Trichoderma reesei.

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Match the following:
List -I | List - II | ||
(A) | Cancer cells | (I) | DNA replication |
(B) | Transcriptional factors | (II) | Saccharomyces |
(C) | Cyclins | (III) | Telomerase |
(D) | Zygote | (IV) | Totipotent cell |

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(A) Diencephalon regulates posture and balance.
(B) Cerebral hemispheres control voluntary movements.
(C) Medulla oblongata regulates involuntary activities.
(D) Cerebellum regulates temperature.
