Q. No.If there are two forms of a specific enzyme in a population, and if the relative frequencies of the individuals possessing each form of the enzyme changes, then certainly there is:
1. mutation 2. genetic drift 3. gene migration 4. evolution
The best evidence for tracing phylogeny amongst a group of organisms will be similarities in their:
| 1. | anatomy | 2. | DNA and Proteins |
| 3. | development | 4. | courtship behavior |
Industrial melanism is an excellent example of ‘evolution in action’ where the selecting agent is:
| 1. | humans | 2. | toxins from smoke |
| 3. | birds | 4. | tree bark |
Members belonging to the same biological species are potentially able to:
1. compete with members of other species only
2. express all the same genes in all their cells
3. breed with members of other biological species
4. interbreed and produce fertile offspring
Flowering plants (angiosperms) first appeared during :
1. Paleozoic era
2. Carboniferous period
3. Cretaceous period
4. Cenozoic era
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Species formation without branching of the evolutionary line of descent is called as:
1. anagenesis, or phyletic evolution
2. cladogenesis, or divergent evolution
3. convergent evolution
4. allopatry
In which of the following groups of organisms is the sympatric speciation most likely to occur?
1. amphibians
2. arthropods
3. plants
4. birds
The wings of an insect and the wings of a bird are examples of:
| 1. | analogous structures | 2. | homologous structures |
| 3. | vestigial structures | 4. | phylogenetic structures |
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The first mammals arose in the _____ period:
1. Carboniferous
2. Jurassic
3. Cretaceous
4. Triassic
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Which theory, regarding the origin of life, is alternatively also called “panspermia”?
| 1. | Special Creation | 2. | Spontaneous Generation |
| 3. | Cosmozoan Theory | 4. | Biochemical Evolution |
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