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Q. No.Select the correct statement:
1. Darwinian variations are small and directionless
2. Mutations are random and directional
3. Fitness is the end result of the ability to adapt and get selected by nature
4. All mammals except whales and camels have seven cervical vertebrae
Subtopic: Concept of Organic Evolution: Evidence |
75%
From NCERT
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The two key concepts of Darwinian theory of evolution are
1. Fitness
2. Branching descent
3. Natural selection
4. Both (2) and (3)
1. Fitness
2. Branching descent
3. Natural selection
4. Both (2) and (3)
Subtopic: Other Theories of Origin of Life | Darwin's Theory |
88%
From NCERT
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In modern synthetic theory, the unit of evolution is
1. Genus
2. Species
3. Population
4. Individual
1. Genus
2. Species
3. Population
4. Individual
Subtopic: Modern Theory of Evolution |
62%
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Neo-Darwinism believes that new species develop through
1. Mutations with natural selection
2. Continuous variations with natural selection
3. Hybridisation
4. Mutations
1. Mutations with natural selection
2. Continuous variations with natural selection
3. Hybridisation
4. Mutations
Subtopic: Modern Theory of Evolution |
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Which is not a concept of Lamarckism?
1. Rate and survival of organisms are different due to variations
2. Environmental pressure produces variations
3. An organ in constant use will grow in size
4. Inheritance of acquired characters
1. Rate and survival of organisms are different due to variations
2. Environmental pressure produces variations
3. An organ in constant use will grow in size
4. Inheritance of acquired characters
Subtopic: Theory of Evolution & Lamarckism |
54%
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Weismann's theory of germplasm rejected
1. Mutation theory
2. Darwin's theory of natural selection
3. Darwin's theory of Pangenesis
4. Neo-Darwinism
1. Mutation theory
2. Darwin's theory of natural selection
3. Darwin's theory of Pangenesis
4. Neo-Darwinism
Subtopic: Darwin's Theory |
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Which of the following animals show adaptive radiation based on locomotion?
1. Scorpion, elephant, human
2. Cheetah, kangaroo, mole
3. Praying mantis, seal, python
4. Cockroach, squirrel, toad
1. Scorpion, elephant, human
2. Cheetah, kangaroo, mole
3. Praying mantis, seal, python
4. Cockroach, squirrel, toad
Subtopic: Concept of Organic Evolution: Evidence |
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Genetic drift
1. Is random change in gene frequency
2. Has nothing in common with inbreeding
3. Is appearance of recessive genes
4. Produces greatest flunctuation in large populations
1. Is random change in gene frequency
2. Has nothing in common with inbreeding
3. Is appearance of recessive genes
4. Produces greatest flunctuation in large populations
Subtopic: Hardy Weinberg Law |
77%
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Gene pool of a population tends to remain stable if the population is large, without large scale mutations,
without migration and with
1. Random mating
2. Moderate environmental changes
3. Natural selection
4. No predator control
without migration and with
1. Random mating
2. Moderate environmental changes
3. Natural selection
4. No predator control
Subtopic: Hardy Weinberg Law |
68%
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Industrial melanism as found in peppered moth proves that
1. Melanic form has no selective advantages in industrial area
2. Lighter form has no selective advantage in polluted industrial area and non-polluted area
3. Melanism is pollution generated feature
4. True black melanic form developed by recurring random mutation
1. Melanic form has no selective advantages in industrial area
2. Lighter form has no selective advantage in polluted industrial area and non-polluted area
3. Melanism is pollution generated feature
4. True black melanic form developed by recurring random mutation
Subtopic: Concept of Organic Evolution: Evidence |
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