Paleozoic
Mesozoic
Cenozic
Proterzoic
D. Proterzoic
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
Pliocene
Holocene
Pleistocene
Palaeocene
differentiation of species
maintenance of species
evolutionary divergence
extermination of species
homologous
analagous
ativistic
vestigeal
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
Lamarck
Morgan
Charles Darwin
Many biologists of 19th century
Darwin
Wallace
Mendel
Lamarck
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
Centred Africa
China
India
Australia
Peripatus
Palaemon
Limulus
Heteronereis
occurrence of homologous and vestigeal organs
occurrence of analogous and vestigial organs
occurrence of homologous and analogous organs
occurrence of analogous oragans only
Wisdom teeth
Fossa ovalis
Muscles of ear pinna
Ileum
moulds
coprolites
petrified
cast
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
Bateson
Mendel
Wallace
Lamarck
Peripatus
Archaeopteryx
Tachyglossus
Balanoglossus
Mutation
Environmental factors
Lama's theory
Chromosomal aberrations
Pisces
Birds
Ruling mammals
Ruling reptiles
1859
1885
1883
1897
environmental factors
mutations
malthu's ideas on population control
all of these
Fishes
Amphibians
Reptiles
Birds
protein folding
transcriptional control
nonsense mutation
none of these
after the extinction of dinosaurs
before the origin of dinosaurs
along with dinosaurs
from the dinosaurs
Charles Darwin
Lamarck
Wsismann
Becker
wings of a bird and butterfly
wings of pigeon and bat
limbs of horse and man
paddles of dolphin and fins of a fish
morphology
physiology
taxonomy
embryology
adaptive radiation
adaptive convergence
use and disuse of organs
none of these
Oriental region
Ethiopian region
Australian region
Palaearctic region