The tear glands help us in
sobbing
protecting the eye
preventing dust
providing a clean moist surface
Correct Answer :
D. providing a clean moist surface
Related Questions
Calcium and phosphorus assimilation will depend on sufficient intake of
vitamin B complex
vitamin D
vitamin A
vitamin C
The phenomenon of summer sleep by animals is called
hibernation
aestivation
laziness
lethargy
Ecology of a population is known as
demecology
synecology
autecology
space ecology
Infection of salivary glands by a virus leads to
tetanus
mumps
pyorrhoea
ulcers
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
The bacteria that gets into our body is consumed by
RBC
Blood platelets
Plasma
Phagocytes
Which of the following is NOT a viral disease?
Chicken-pox
Influenza
Epilepsy
Measles
Two tall plants, each being a hybrid and carrying a recessive factor for dwarfness are crossed. What proportion of their offspring will be dwarf?
0.5
0.25
0.75
1
The bone cells are connected with each other by
Haversian canal
canaliculi
capillaries
matrix
What are halophytes?
plants found in fresh water
plants growing in saline conditions
mesophytic plants
desert plants
The disease Goitre is caused in persons who do not have in their diet sufficient
calcium
sodium
iodine
iron
Phenylketonuria is an example of an inborn error of metabolism. Thins error refers to
hormonal overproduction
atrophy of endocrine glands
inherited lack of an enzyme
nondisjuction of chromosomes
Injection of insulin causes
increase in glucose in blood
decrease in glucose in blood
increase in blood pressure
decrease in blood pressure
The liver destroys old
leucocytes
thrombocytes
erythrocytes
lymphocytes
The rate of heartbeat is accelerated by the hormone
adrenaline
acetylcholine
thyroxine
pituitrin
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 equilibrium and co-ordination is looked after by which part of the brain?
Cerebrum
Medulla oblongata
Cerebellum
Olfactory lobes
Human blood is oxygenated and purified in the
heart
lungs
liver
kidneys
The genetic code DNA is carried from the nucleus to Ribosome by
t-RNA
r-RNA
S-DNA
ATP
Hormones are carried from their place of production by
ducts
blood
lymph
muscus
In a gamete there will be
one pair of sex chromosomes
only one sex chromosome
no sex chromosome
only autosomes
Fat present below the skin surface in our body acts as a barrier against
loss of heat from the body
loss of essential body fluids
loss of salts from the body
entry of harmful micro-organisms from the environment
Modern classification of the living world recognise ___________ kingdoms.
two
three
four
five
Blood clot Inside blood vessels is prevented by
heparin
fibrinogen
thrombin
prothrombin
The golden age of Dinosaurs was
Palaezoic
Cenozoic
Mesozoic
Proterozoic
In one minute normally the heart beats
60 times
80 times
100 times
72 times
Phototropism means that plants react to the direction of
sound
wind
light
gravity
Measles is caused by
bacteria
fungus
virus
protozoan
Plants grown in darkness show
stout stem
long internodes
bigger leaves
no growth at all
Bacteria utilising radiant energy to prepare food are
chemosynthetic bacteria
heterotrophic bacteria
photosynthetic bacteria
free living bacteria