2n = 44
2n = 46
2n = 48
none of these
C. 2n = 48
a petrified specimen
a mineralised specimen
a mould
embedded in amber
Mutation
Polyploidy
Natural selection
Acquired characters
occurrence of homologous and vestigeal organs
occurrence of analogous and vestigial organs
occurrence of homologous and analogous organs
occurrence of analogous oragans only
Homo sapiens
Pithecanthropus
Sinanthropus
None of these
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
Mesozoic era
Coenozoic era
Palaeozoic era
None of these
origin of life
evolution
mutations
embryology
Oriental region
Ethiopian region
Australian region
Palaearctic region
homological evidence for evolution
palaentological evidence for evolution
biogeographic evidence for evolution
none of these
Charles Darwin
Lamarck
Wsismann
Becker
Paleozoic
Mesozoic
Cenozic
Proterzoic
by comparing it to living similar forms
by radioactive dating
by rate of erosion of the strata
from the depth of strata at which it is found
Peripatus
Palaemon
Limulus
Heteronereis
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
cartilage and bone
proteins
inorganic materials
keratin materials
Darwin
Wallace
Mendel
Lamarck
Sinanthropus pekinensis
Homoerectus
Homo rhodesiensis
Homo spisaens
1859
1885
1883
1897
miobibbus
eohippus
merychippus
pliohippus
animals are destroyed by environment
animals are destroyed by scavangers
animals are burried by natural " processes
organisms are burried and preserved by natural processes
Java man
Neanderthal man
Peking man
Cromagnon man
Mutation
Environmental factors
Lama's theory
Chromosomal aberrations
increase in the size of eyes
increase in the size of brain
straightening of back
change in dentition from browsing to grazing
Fishes
Amphibians
Reptiles
Birds
wings of a bird and butterfly
wings of pigeon and bat
limbs of horse and man
paddles of dolphin and fins of a fish
differentiation of species
maintenance of species
evolutionary divergence
extermination of species
morphology
physiology
taxonomy
embryology
after the extinction of dinosaurs
before the origin of dinosaurs
along with dinosaurs
from the dinosaurs
2n = 44
2n = 46
2n = 48
none of these
batesian mimicry
mullerian mimicry
warning colouration
concealing colouration