Sexual selection theory was propounded by
Wallace
De Vires
Lamarck
Charles Darwin
Correct Answer :
D. Charles Darwin
Related Questions
What are oncogenes?
a dominant gene
a set of genes which produce cancer
a gene present in the X-chromosomes causing haemophilia
a recessive gene
Which of the following diseases are not bacterial?
cholera and diphtheria
trichomonasis and malaria
tetanus and typhoid
tuberculosis and leprosy
Maize is attacked by
Phytophthora
Pythium
Ustilago
Puccinia
What are top carnivores?
biggest carnivores
tigers
all carnivorous animals
carnivores that are not eaten by any other animal
The oldest era is
Palaeozoic
Mesozoic
Cenozoic
Proterozoic
The age of a tree can be determined by
counting the number of annual rings
thickness of the bark
the bulk of the tree
the number of leaves
The closing and opening of the leaves of Mimosa pudica (Touch me not) plant is due to _______ movement.
chemonastic
seismonastic
thermonastic
photonastic
Synthesis of nutrients by green plants is called
photo-oxidation
photo-respiration
photo-synthesis
photo-periodism
Green plants In the sea are useful for respiration of flash because they
release oxygen
release carbon dioxide
release oxygen and carbon dioxide simultaneously
take oxygen and give out carbon dioxide
The theory that cells arise from the pre-existing cells was proposed by
Nageli
Virchow
Schleiden
Muller
The smallest size of a cell which can be seen directly by the eye is
One micron
10 micron
100 micron
1000 micron
Who was the first scientist/doctor who attempted vaccination?
Joseph Lister
Robert Koch
Elie Metchnikoff
Edward Jenner
Colour vision is made possible by the cells in the retina called
rods
cones
fovea
blind spot
The best and easy method of control of crop pests is by
crop rotation
chemicals
quarantine
biological control
The cortex of human brain normally consists of
five billion, two hundred million cells
nine billion, two hundred million cells
six billion, two hundred million cells
eight billion, two hundred million cells
Foal' is the young on of the
Cat
Lion
Tiger
Horse
The phenomenon of summer sleep by animals is called
hibernation
aestivation
laziness
lethargy
When one gene controls two or more different characters simultaneously, the phenomenon is called
Apomixis
Pleiotropy
Polyploidy
Polyteny
Diseases in plants can be caused by
virus
bacteria
fungi
All the above
Accepted theory for the origin of life is
Cosmozoic theory
Biogenesis
Abiogenesis
Oparin's theory
Darwinism does not explain
progression
retrogression
usefulness of all organs
presence of vestigial organs
The normal systolic blood pressure is
140
120
180
80
The plants will stop growing if the shoot tip is cut off because
shoot tip produces growth hormones
shoot tip contains meristematic cells
shoot tip is the growing part
the plant dies
Vitamin D is known as anti-rachitic vitamin because it cures the deficiency disease called
Rickets
Beriberi
Xerophthalmia
Sterility
Dr Khorana's work relates to
synthesis of simple DNA
genetic code
reduction of mutation
synthesis of RNA from bacterial cell
Oparin is known for his hypothesis on
origin of species
origin of life
one germ one disease
one gene one enzyme
The energy for the sperm to swim and reach the egg is provided by
tail
head
neck
mitochondria
The 'mad-cow disease' (Jakob-Creutzfeldt disease) is produced by certain
bacterium
virus
viroid
prion
Cretinism is due to the disorder of the glands
Thymus
Parathyroid
Thyroid
Adrenal
The hormone which is Popularly called as stress hormone is
Epinephrine
Cortisone
Thyroxine
Insulin