The theory that cells arise from the pre-existing cells was proposed by
Nageli
Virchow
Schleiden
Muller
Correct Answer :
B. Virchow
Related Questions
Lactose and Rennin, the enzymes required to digest milk, disappear in the human body by the age of _______ years.
2
3
5
8
Desert plants are called
Xerophytes
Bryophytes
Pteridophytes
Halophytes
What is an antigen?
toxic substance
a kind of protein
blood platelets
blood corpuscles
Chemical substances that called have effect on growth of plants are called
enzymes
catalysts
hormones
pesticides
When the earth was formed it had an atmosphere with
Hydrogen, Oxygen and Nitrogen
Water Vapour, Hydrogen and Oxygen
Oxygen, Carbondioxide and Nitrogen
Water Vapour, Ammonia and Methane
The deficiency of Vitamin A which leads to poor vision during night is termed
nyctolopia
myopia
glaucoma
colour blindness
The grouping o( blood is based on substances called
antibodies
antigens
antitoxin
enzymes
The blood clotting requires the vitamin
A
B
C
K
From the end of the Triassic to the cretaceous period the earth was ruled by
eurypterids
cotylosaurs
dinosaurs
mammals
Cancer is induced by certain viruses called
poxviruses
adenoviruses
oncogenic viruses
herpesviruses
The dreaded virus which, on reaching the central nervous system, produces spasms of the muscles of the throat and the cheat while swallowing, and is sure to kill the patient is
Poliomyelitis virus
AIDS virus
Smallpox virus
Rabies virus
Light compensation zone refers to
where light is available in plenty
where all light energy is used
where light is maximum
beyond which light does not penetrate
Malnutrition is due to
undernourishment
want of balanced diet
overfeeding
All the above
Scrub jungle Is characterised by
heavy rainfall
no rainfall
poor rainfall
none of the above
What is an antigen?
Toxic substance
A kind of protein
Blood platelets
Blood corpuscles
Tetrodotoxin is a potent poison that
erodes blood vessels
blocks conduction of nerve impulses causing respiratory paralysis
produces damage to the kidneys
produces intestinal bleeding
When does the heart start functioning?
At birth
After birth
Before birth
After a week from birth
At the end of a reaction enzymes are
left as they are
reduced
increased
neutralised
Memory is the responsibility of
cerebrum
cerebellum
medulla oblongata
spinal cord
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
Spontaneous generation signifying the development of living organisms from non-living has been termed
Biogenesis
Abiogenesis
Cosmozoic
Catastrophism
The plant hormone which promotes ripening of fruits is
auxin
ethylene
gibberellin
cytokinin
Gases of Jupiter' are
Ammonia, Methane, Hydrogen
Sulphur, Urethane, Oxygen
Carbon, Phosphorus and Oxygen
Nitrogen, Hydrogen and Chlorine
Rh+ blood is due to genes which are
dominant
recessive
codominant
neutral
Blood cancer is otherwise called
Leukaemia
Leucoderma
Leucocytopenia
Erythrocemia
Leaves Call off branches In the winter because of
fall in atmospheric pressure
completion of the duration of life of the plant
formation of separation (absciss layer) just outside the cork
shortening of day time
One of the following is called a feminine hormone. Which one is it?
Oestrogen
Testosterone
Pituitrin
Thyroxine
Loss of blood is
clotting
receding
healing
drying up
Which one is called anti-haemorrhagic vitamin?
A
C
E
K
Bats can fly in the dark because
they have a better vision in the dark
the light startles them
they produce high pitched sounds called ultrasonics
None of the above