differentiation of species
maintenance of species
evolutionary divergence
extermination of species
C. evolutionary divergence
Mesozoic era
Coenozoic era
Palaeozoic era
None of these
environmental factors
mutations
malthu's ideas on population control
all of these
Bateson
Mendel
Wallace
Lamarck
wings of a bird and butterfly
wings of pigeon and bat
limbs of horse and man
paddles of dolphin and fins of a fish
Fishes
Amphibians
Reptiles
Birds
occurrence of homologous and vestigeal organs
occurrence of analogous and vestigial organs
occurrence of homologous and analogous organs
occurrence of analogous oragans only
moulds
coprolites
petrified
cast
Centred Africa
China
India
Australia
Lamarckism
Theory of natural selection
Bird flight mechanisms
Both and
Mutation
Polyploidy
Natural selection
Acquired characters
Australopithecus
Homo erectus
Sinanthropus
Ginganlo pithecus
offspring of hybrids are inviable or sterile
a hybrid zygote is formed but it fails to develop
hybrid adults fail to produce functional gametes
sperms and ova of different species of animals are unable to fuse
Darwin
Herbert Spencer
Mai thus
Lovell
they show adaptive variations to their environment
they share the common karyotype
they can freely interbreed and share a common gene pool
their features are different yet they are similar essentially
protein folding
transcriptional control
nonsense mutation
none of these
a petrified specimen
a mineralised specimen
a mould
embedded in amber
Lamarck
Morgan
Charles Darwin
Many biologists of 19th century
Charles Darwin
Lamarck
Wsismann
Becker
Paleozoic
Mesozoic
Cenozic
Proterzoic
Mutation
Environmental factors
Lama's theory
Chromosomal aberrations
Oriental region
Ethiopian region
Australian region
Palaearctic region
2n = 44
2n = 46
2n = 48
none of these
Peripatus
Archaeopteryx
Tachyglossus
Balanoglossus
cartilage and bone
proteins
inorganic materials
keratin materials
increase in the size of eyes
increase in the size of brain
straightening of back
change in dentition from browsing to grazing
Darwin
Wallace
Mendel
Lamarck
1859
1885
1883
1897
adaptive radiation
adaptive convergence
use and disuse of organs
none of these
animals are destroyed by environment
animals are destroyed by scavangers
animals are burried by natural " processes
organisms are burried and preserved by natural processes
batesian mimicry
mullerian mimicry
warning colouration
concealing colouration