1. adaptive radiation
2. seasonal migration
3. brood parasitism
4. connecting links
adaptive radiation
1. adaptations due to geographical isolation
2. evolution of different species from a common ancestor
3. migration of members of a species to different geographical areas
4. power of adaptation in an individual to a variety of environments
evolution of different species from a common ancestor
1. Darwinian variations are small and directionless
2. fitness is the end result of the ability to adapt and gets selected by nature
3. all mammals except whales and camels. have seven cervical vertebrae
4. mutations are random and directional
fitness is the end result of the ability to adapt and gets selected by nature
1. the true black melanic forms arise by a recurring random mutation
2. the melanic form of the moth has no selective advantage over lighter form in industrial area
3. the lighter form moth has no selective advantage either in polluted industrial area or non-polluted area
4. melanisna is :a pollution generated-feature phenom
the true black melanic forms arise by a recurring random mutation
1. Phylogeny
2. Ancestry
3. Palaeontology
4. Ontogeny selection
Phylogeny
1. Mutations
2. Reproductive Isolation
3. Sexual Reproduction
4. All of these
All of these
1. Darwin
2. Lamarck
3. Weismarin
4. Herbert SPencer
Lamarck
1. Parasites and predators as natural enemies
2. Survival of the fittest
3. Struggle for existence
4. Discontinuous variations
Discontinuous variations
1. Parasites and predators as natural enemies
2. Survival of the fittest
3. Struggle for existence
4. Discontinuous variations
Discontinuous variations
1. natural selection
2. induced mutation
3. geographical isolation
4. reproductive isolation
natural selection