The first sign of life made its appearance on the earth about
1 million years ago
500 million years ago
1 billion or 1000 million years ago
3 billion years ago
Correct Answer :
D. 3 billion years ago
Related Questions
The 'father of genetics' is
Mendel
Morgan
Darwin
Muller
Which one of the following acts as a communication system?
Blood
Nerve
Lymph
Enzymes
Which of the following is a vector-borne disease for which a special programme has been launched by the Govt. of India?
Polio
HIV / AIDS
Malaria
Cancer
The rate of growth of plants can be measured by a/an
manometer
auxanometer
photometer
thermometer
Niche' refers to
place of living
type of food
place of living and type of food
food and movement
Valve a are present inside
Arteries
Capillaries
Veins
Lymph vessels
Which of the following terms is used in Botany?
Recession
Dumping
Barter System
Biennial
What is an antigen?
Toxic substance
A kind of protein
Blood platelets
Blood corpuscles
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
Dr Khorana's work relates to
synthesis of simple DNA
genetic code
reduction of mutation
synthesis of RNA from bacterial cell
Saffron is the dried ________ of the saffron plant.
fruit
aril
stigmas and tops of styles
tender leaves and sprouts
Maintenance of pregency is under the control of
Follicular stimulating hormone
Growth hormone
Estrogen
Progesterone
Warm-bloodedness
means, animals living in warm climates
means, the warming up of blood as the temperature increases during day time
is characterised by constant body temperature
is shown by reptiles
Infection of salivary glands by a virus leads to
tetanus
mumps
pyorrhoea
ulcers
The 'graveyard of the RBC' refers to
spleen
liver
bone marrow
thymus
Lecuminous plants are recommended for rotation of crops because they
kill harmful insects
require little amount of water
help in Nitrogen fixation
are cash crops
Diabetes is a disease which is
contagious
non-communicable
communicable
epidemic
The corn in an underground stem that grows
horizontally
vertically
above the soil
obliquely
Life begets life' or biogenesis was stated by
Robert Koch
Miller
Louis Pasteur
Lord Lister
Mutations could be created by X-rays. This was found by
Muller
Morgan
Meyer
Flemming
Antisnake venom is prepared by
Pasteur institute
Hoffkine's institute
Birla's institute
Indian Science Institute
Blood plasma from which fibrinogen is removed is known as
serum
blood concentrate
lymph
antibody component
Biological control is to check growth of
plants
animals
weeds
one pest by another
The aphotic zone means that light is
always present
present during day
always absent
present during night
The geotropism of the roots that makes them grow towards gravity is said to be
positive
negative
neutral
oblique
Injection of insulin causes
increase in glucose in blood
decrease in glucose in blood
increase in blood pressure
decrease in blood pressure
Total number of amino acids in plants is
10
20
30
Plenty
Cancer is induced by certain viruses called
poxviruses
adenoviruses
oncogenic viruses
herpesviruses
Vitamin D deficiency leads to
sterility
pellagra
rickets
capillary fragility
The Green Revolution in India owes much to
MS Swaminathan
TS Venkataraman
Norman Borlaug
Prime Minister