Who was the first scientist to use an instrument for biological studies in 1665?
Robert Hooke
Schwann
Schleiden
None of the above
Correct Answer :
A. Robert Hooke
Related Questions
Who first observed the plasma membrane?
William Seifriz
Schwann
Palade
None of the above
Nekton are those organisms
which cannot be netted
which are independent of tides and waves
which have long necks
None of the above
The science dealing with diseases of plants is called
Plant anatomy
Plant ecology
Plant pathology
Plant morphology
The normal systolic blood pressure is
140
120
180
80
The heart of the human embryo starts beating in the _____ week of its development.
second
third
fourth
first
The theory of 'jumping genes' was propounded by
Gregor John Mendel
Thomas Hunt Morgan
Barbara McClintock
Watson and Crick
The aphotic zone means that light is
always present
present during day
always absent
present during night
Biocatalysts are
hormones
vitamins
enzymes
pheromones
Herbivores are
primary consumers
secondary consumers
tertiary consumers
decomposers
The method of inducing artificial immunity was discovered by
Jenner
Tolstoy
Pasteur
Morgan
Dr Khorana's work relates to
synthesis of simple DNA
genetic code
reduction of mutation
synthesis of RNA from bacterial cell
Baldness is seen only in the males because
it is a male disorder
it is linked with male Y chromosome
it is influenced by male hormone
females cover it up with wigs
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
The buffer substance in blood is
Calcium carbonate
Carbon dioxide
Sodium bicarbonate
Ammonia
The disease Goitre is caused in persons who do not have in their diet sufficient
calcium
sodium
iodine
iron
The metallic part of haemoglobin is
copper
molybdenum
nickel
iron
Oxygen transport is a function of
white blood corpuscles
red blood corpuscles
blood platelets
plasma
The function of a cell wall is
to give definite shape to the cell
to provide mechanical strength and protection to the cell
to prevent the cell from desiccation
All the above
The radicle of the seeding always grows
towards the gravity
away from gravity
neutral to gravity
towards light
In case of a heart attack a hormone is injected as an emergency measure. Which one is it?
Thyroxine
Adrenaline
Heparin
Insulin
The eland having endorine as well as exocrine function is
Adrenal gland
Thyroid gland
Pituitary gland
Pancreatic gland
Coagulation of blood in vessels is prevented during normal circulation by
heparin
prothrombin
plasmogen
thromboplastin
The plant cells are surrounded rigidly by
plasmalemma
cell membrane
cell wall
plasma membrane
Which one of the following acts as a communication system?
Blood
Nerve
Lymph
Enzymes
Rate of mutation can be increased in plants by
More manure
More pesticides
X-ray
More light
Necrosis is a symptom which is recognised by
pattern colouration on leaves
little leaves
out growth
death of tissues
Which of the following plays an important part in photosynthesis?
Chloroplast
Centrosome
Tonoplast
Nematoblast
Whale reproduces by
ovipary
vivipary
ovovivipary
fission
Chemical substances that called have effect on growth of plants are called
enzymes
catalysts
hormones
pesticides
The disease in which blood clotting does not take place is known as
xerophthalmia
haemopoiesis
haemophilia
haemoerythrin