Human beings living in different geographical areas and under different environmental conditions are kept under one species because
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
Correct Answer :
C. they can freely interbreed and share a common gene pool
Related Questions
The age of a fossil may be determined most accurately
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
The book "Origin of Species" was written by Charles Darwin in
1859
1885
1883
1897
Which were dominant during Mesozoic era
Pisces
Birds
Ruling mammals
Ruling reptiles
Connecting link between nonchordata and chordata is
Peripatus
Archaeopteryx
Tachyglossus
Balanoglossus
The idea of spontaneous generation is essentially correct in regard to
origin of life
evolution
mutations
embryology
Along with reduction in the number of toes in the modern horse, the other most significant evolutionary change is
increase in the size of eyes
increase in the size of brain
straightening of back
change in dentition from browsing to grazing
We use the term hybrid breakdown when the
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
The recent ancestors of modem man were
Java Ape and Peking man
Peking man and Rhodesian man
Cromagnon man and Rhodesian man
Cromagnon man and Neanderthal man
Darwin proposed his theory of natural selection on the basis of
Mutation
Environmental factors
Lama's theory
Chromosomal aberrations
Species were regarded as unchangeable by
Lamarck
Morgan
Charles Darwin
Many biologists of 19th century
The function affected by point mutation in p-globin in sickle cell anaemia is
protein folding
transcriptional control
nonsense mutation
none of these
Survival due to geographic isolation is best exemplified by mammalian fauna of
Oriental region
Ethiopian region
Australian region
Palaearctic region
A connecting link between Annelids and Arthropods is
Peripatus
Palaemon
Limulus
Heteronereis
Co-worker of Darwin was
Bateson
Mendel
Wallace
Lamarck
Appearance of ancestral characters in the new born, such as tail, monstral face, gill slits, multiple mammale etc. are known as
homologous
analagous
ativistic
vestigeal
Amphibians appeared and became dominant in the
Mesozoic era
Coenozoic era
Palaeozoic era
None of these
The study of Galapagos Finches shows
adaptive radiation
adaptive convergence
use and disuse of organs
none of these
A fossil is a
laboratory preserved animal
dead animal of the past
organic relic of the past
stuffed animal
Which is a vestigeal organ of python
Nose
Scales
Teeth
Hindlimbs
Which is not a vestigeal organ
Wisdom teeth
Fossa ovalis
Muscles of ear pinna
Ileum
Which animals dominated in Paleozoic era ?
Fishes
Amphibians
Reptiles
Birds
The concept of use and disuse of organs was given by
Darwin
Wallace
Mendel
Lamarck
A starfish with six arms, may be a case of
variation
evolution
autotomy
mutation
Which of these does not play a role in evolution ?
Mutation
Polyploidy
Natural selection
Acquired characters
In forming the theory of evolution by Natural Selection, Charles Darwin was greatly influenced by
environmental factors
mutations
malthu's ideas on population control
all of these
Pangenesis theory was given by
Charles Darwin
Lamarck
Wsismann
Becker
An example of analogy is
wings of a bird and butterfly
wings of pigeon and bat
limbs of horse and man
paddles of dolphin and fins of a fish
A kind of mimicry which presumably works as a double insurance is
batesian mimicry
mullerian mimicry
warning colouration
concealing colouration
The earliest ancestor of horse from early Eocene period is
miobibbus
eohippus
merychippus
pliohippus
Human beings living in different geographical areas and under different environmental conditions are kept under one species because
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