The hypothesis that living matter originated in the past from non-living matter is supported by
Fossil records
Miller's experiments
Pasteur experiment
Spallanzeni experiment
Correct Answer :
B. Miller's experiments
Related Questions
Insects that make a clicking sound are
crickets
beetles
flies
silver fish
Hormone promoting maleness in flowering plants is
Indole Acetic Acid
Kinetin
Cytokinin
Gibberellin
The insect vector for the disease Leishmaniasis is
Tsetse fly
Culex
Phlebotomus
Anopheles
Herbivores are
primary consumers
secondary consumers
tertiary consumers
decomposers
An inherited characteristic which does not appear in one generation but can appear in the next is called
dominant
recessive
homozygous
heterozygous
If a father has blood group A and the mother has blood group 0, which one of the blood groups may be found in their progeny?
A
AB
O
Both (a) and (c)
Charles Darwin was influenced in his work by
Wallace
Lamarck
Malthus
Mendel
The first person to observe the bacteria, protozoa and spermatozoa under the microscope was
Theodore Schwann
Matthias Schleidon
Robert Hooke
Leuwenhoek
Food substances are substances by
hormones
enzymes
vitamins
zymogens
In a gamete there will be
one pair of sex chromosomes
only one sex chromosome
no sex chromosome
only autosomes
Saliva flows at the sight of food. This action is
involuntary
voluntary
a reflex
causative
In phototropism, auxins
Promote growth of cells
Inhibit cell division
Inhibit growth of cells
Stimulate differential growth of cells
Blood clotting requires vitamin
A
B
C
K
The pathogenic organisms of an infected person are destroyed by the action of
erythrocytes
leucocytes
blood platelets
all of these
Dialysis is used when there is a failure of
heart
lungs
liver
kidneys
Vessels proceeding to the heart are
veins
arteries
capillaries
lymph ducts
The buffer substance in blood is
Calcium carbonate
Carbon dioxide
Sodium bicarbonate
Ammonia
Oxygen transport is a function of
white blood corpuscles
red blood corpuscles
blood platelets
plasma
The best and easy method of control of crop pests is by
crop rotation
chemicals
quarantine
biological control
Veins carry blood
towards the heart
away from the heart
both to and from the heart
only around the heart
The cavities of the brain are filled with
Blood
Lymph
Water
Cerebrospinal fluid
One of the following is often called the master gland. Which one is it?
Thymus
Islets of Langerhans
Pituitary
Thyroid
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
What are top carnivores?
biggest carnivores
tigers
all carnivorous animals
carnivores that are not eaten by any other animal
Coagulation of blood in vessels is prevented during normal circulation by
heparin
prothrombin
plasmogen
thromboplastin
The two German scientists who proposed the 'cell theory' were
Mendel and 'Darwin
Theodore Schwann and Matthias Schleiden
Virchow and Purkinje
porter and Palade
Fishes send out their nitrogenous waste as
ammonia
urea
uric acid
sweat
Milk fever in cows occurs due to lack of
Phosphates
Calcium
Iron
Iodine
Vitamin D is manufactured in a healthy human being by the action of _______ on the skin and absorbed in the blood stream.
ozone
radium
moonlight
sunlight
Vestigeal organs are those which are
fully formed and functional
much reduced but functional
much reduced and functionless
fully formed but functionless