A starfish with six arms, may be a case of
variation
evolution
autotomy
mutation
Correct Answer :
A. variation
Related Questions
The book "Origin of Species" was written by Charles Darwin in
1859
1885
1883
1897
Pangenesis theory was given by
Charles Darwin
Lamarck
Wsismann
Becker
The resemblance between the south American llama and the African camel indicates a common ancestry. This is
homological evidence for evolution
palaentological evidence for evolution
biogeographic evidence for evolution
none of these
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
Connecting link between nonchordata and chordata is
Peripatus
Archaeopteryx
Tachyglossus
Balanoglossus
Which is a vestigeal organ of python
Nose
Scales
Teeth
Hindlimbs
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
Co-worker of Darwin was
Bateson
Mendel
Wallace
Lamarck
The concept of use and disuse of organs was given by
Darwin
Wallace
Mendel
Lamarck
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
Doubis in 1891 found the fossil of Java ape man. It is
Sinanthropus pekinensis
Homoerectus
Homo rhodesiensis
Homo spisaens
The function affected by point mutation in p-globin in sickle cell anaemia is
protein folding
transcriptional control
nonsense mutation
none of these
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
Which animals dominated in Paleozoic era ?
Fishes
Amphibians
Reptiles
Birds
Role of isolation in evolution is
differentiation of species
maintenance of species
evolutionary divergence
extermination of species
Fire was first used for protection and cooking by
Java man
Neanderthal man
Peking man
Cromagnon man
Ontogeny recapitulates phylogeny is the statement relating to
morphology
physiology
taxonomy
embryology
The idea of spontaneous generation is essentially correct in regard to
origin of life
evolution
mutations
embryology
The study of Galapagos Finches shows
adaptive radiation
adaptive convergence
use and disuse of organs
none of these
The earliest ancestor of horse from early Eocene period is
miobibbus
eohippus
merychippus
pliohippus
The first mammal arose
after the extinction of dinosaurs
before the origin of dinosaurs
along with dinosaurs
from the dinosaurs
Geological evidence of most primitive mammals is found in
Centred Africa
China
India
Australia
Which is not a vestigeal organ
Wisdom teeth
Fossa ovalis
Muscles of ear pinna
Ileum
A kind of mimicry which presumably works as a double insurance is
batesian mimicry
mullerian mimicry
warning colouration
concealing colouration
Fossilisation occurs where
animals are destroyed by environment
animals are destroyed by scavangers
animals are burried by natural " processes
organisms are burried and preserved by natural processes
Which of these does not play a role in evolution ?
Mutation
Polyploidy
Natural selection
Acquired characters
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 fossil is a
laboratory preserved animal
dead animal of the past
organic relic of the past
stuffed animal
Survival due to geographic isolation is best exemplified by mammalian fauna of
Oriental region
Ethiopian region
Australian region
Palaearctic region
Some of the important evidences of organic evolution are
occurrence of homologous and vestigeal organs
occurrence of analogous and vestigial organs
occurrence of homologous and analogous organs
occurrence of analogous oragans only