- 1(current)
Q. No.One of the important consequences of geographical isolation is
1. no change in the isolated fauna
2. preventing speciation
3. speciation through reproductive isolation
4. random creation of new species
Two geographical regions separated by high mountains are
1. Oriental and Austrailian
2. Palaearctic and Oriental
3. Nearctic and Palaearctic
4. Neotropical and Ethiopian
Which of the following is the most important precondition for speciation to occur?
(1) Reproductive isolation
(2) A crash of the population size
(3) Adaptive radiation
(4) Random mating
What is true about the isolated small tribal populations?
| 1. | There is a decline in population as boys marry girls only from their own tribe. |
| 2. | Hereditary diseases like colourblindness do not spread in the isolated population. |
| 3. | Wrestlers who develop strong body muscles in their life time pass this character on to their progeny. |
| 4. | There is no change in population size as they have a large gene pool. |
What does the term 'reproductive isolation' refers to?
| 1. | An individual is unable to fertilise itself |
| 2. | Genes are not exchanged between two populations |
| 3. | Individuals from two populations never mate |
| 4. | Individuals form two populations never produce offsprings |
One of the important consequences of geographical isolation is:
1. no change in the isolated fauna
2. preventing speciation
3. speciation through reproductive isolation
4. random creation of new species
Reason (R): Melanic moths were able to camouflage themselves during industrialization.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
- 1(current)
Q. No.
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