The excess use of herbicides and pesticides etc. has resulted in selection of resistant varieties in a much lesser time. Hence, resistant organisms/cells are appearing in a time span of months or years and not centuries. This statement is:
(1) In favour of evolution by anthropogenic action
(2) Against the natural selection theory
(3) In favour of sexual selection theory
(4) In favour of genetic drift
Industrial melanism cannot be explained by
A. Natural selection theory
B. Mechanism of directional selection
C. Mechanism of genetic drift
D. Mechanism of founder's effect
E. Mechanism of progressive selection
1. A, C, D and E
2. A and D only
3. C and D only
4. D and E only
In a population, homozygous & heterozygous individuals are in a certain proportion. This proportion can't be changed by
1. Natural Selection
2. Mutation
3. Recombination
4. Use and Disuse of organs
Biologists discover about 1000 species in an Island
which is descended from a single ancestor species.
What is the reason behind the such large speciation?
1. Mutation
2. Adaptive radiation
3. Convergent evolution.
4. Reproductive isolation
The sugar glider and flying squirrel belong to two different groups of mammals, but they have both evolved bushy tails and flaps of skin that help them exploit their forest environments more efficiently. This pattern of evolution is an example of :
1. Character displacement
2. Adaptive radiation
3. Convergent evolution
4. Divergent evolution
Natural selection is the survival of fittest, which of the
following most precisely describe the survival of fittest?
1. The physical strength of organism.
2. How many fertile offspring is produced by an
organism.
3. Capability to tolerate environmental extremities.
4. How long they survive.
Which of the following will not show convergent evolution?
1. Eye of Octopus and mammal
2. Flippers of Penguins and Dolphins
3. Sweet potato and potato
4. Hearts of frog and rabbit
Which of the following factor will not affect Hardy-Weinberg equilibrium?
(1) Natural selection
(2) Genetic drift
(3) Genetic recombination
(4) Random mating
Proper burial of dead bodies for the first time started in which pre-historic man’s period?
1. Peking man
2. Java man
3. Neanderthal man
4. Cro-magnon man
Who made huts, used skin of animals and barks of trees as clothes and started burial ceremony for the first time?
1. Homohabilis
2. Java man
3. Neanderthal man
4. Cro-magnon man