The first person to observe the bacteria, protozoa and spermatozoa under the microscope was
Theodore Schwann
Matthias Schleidon
Robert Hooke
Leuwenhoek
Correct Answer :
D. Leuwenhoek
Related Questions
Edward Jenner to find out the efficacy of vaccination used
his own body
his friend's body
a corpse
a laboratory animal
Vessels leaving the heart are
veins
arteries
capillaries
lymph ducts
Herbivores are
primary consumers
secondary consumers
tertiary consumers
decomposers
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
Which one of the following is not an essential micronutrient for plants?
Boron
Zinc
Sodium
Copper
The latest drug for cancer is obtained from
Strychnos nuxvomica
Vinca rosea
Atropa belladona
Phyllanthus niruri
Which among the following may carry rabies?
Cat
Dog
Fox
All the three
Valves are present inside
arteries
capillaries
veins
aorta
Oxygen transport is a function of
white blood corpuscles
red blood corpuscles
blood platelets
plasma
The specific gravity of blood
lower than water
higher than water
same as water
many times that of water
The condition in which there is abnormal decrease of white blood corpuscles is known as
leukaemia
leucoderma
leukopenia
anaemia
Rate of mutation can be increased in plants by
More manure
More pesticides
X-ray
More light
Which organism probably arrived first in the world?
Algae
Fungi
Protozoa
None of the above
Heart is made up of
nonstriated muscle
cardiac muscle
connective tissue
nervous tissue
A few infections like sore throat, whooping cough and tuberculosis are carried through the respiratory system. Which among the following is caused by bacteria while passing through the respiratory tract?
diphtheria
dysentery
jaundice
typhoid
Which of the following crops helps in nitrogen fixation?
Rice
Wheat
Maize
Beans
The aphotic zone means that light is
always present
present during day
always absent
present during night
Blood clotting requires vitamin
A
B
C
K
Which of the following characteristics separates man from all other primates?
Exhibition of curiosity
Degenerate sense of smell
Opposability thumb
Projecting chin
The ultimate substances to which the carbohydrates are degraded are
amino acid
glycerol
glucose
maltose
The protoplasm of a child is exactly the same as that of its
mother
father
grandfather
identical twin
The specific gravity of blood is
lower than water
higher than water
same as water
many times that of water
Kwashiorkar is characterised by
dermatitis, changes in hair pigments and retarded brain growth
excretion of creatine in excess
tyrosinosis and alcaptonuria
None of these
Which of the following diseases is caused by the deficiency of iron in human body?
Anaemia
Scurvy
Dermatosis
None of these
At the end of a reaction enzymes are
left as they are
reduced
increased
neutralised
Which one of the endocrine glands disappears after puberty?
Thyroid
Thymus
Adrenals
Pituitary
Deciduous forests are those with trees
that are evergreen
that shed leaves periodically
that have needle like leaves
that have no leaves at all
The two German scientists who proposed the 'cell theory' were
Mendel and 'Darwin
Theodore Schwann and Matthias Schleiden
Virchow and Purkinje
porter and Palade
Development without fertilization is called
parthenogenesis
asexual reproduction
sporulation
budding
Which of these is most consistently observed in Vitamin B12 deficiency?
Pigmentation of skin
Red, sore tongue with capillary atrophy
Megaloblastic anemia
Absence of tendon reflexes