The energy for the sperm to swim and reach the egg is provided by
tail
head
neck
mitochondria
Correct Answer :
D. mitochondria
Related Questions
Blood is a kind of
epithelial tissue
connective tissue
nervous tissue
cartilage
Late Blight' is a disease that affects the _______ crop.
coconut
cashew
potato
pepper
The term 'Fauna' means
plant kingdom
animal kingdom
neither
Both
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
Nephrons are found inside
Liver
Lung
Brain
Kidneys
The tear glands help us in
sobbing
protecting the eye
preventing dust
providing a clean moist surface
Maintenance of pregency is under the control of
Follicular stimulating hormone
Growth hormone
Estrogen
Progesterone
Necrosis is a symptom which is recognised by
pattern colouration on leaves
little leaves
out growth
death of tissues
Who considered evolution as due to mutation?
Charles Darwin
Lamarck
Hugo de Vries
Cuvier
Which of the following organelles is known as the 'power House' of the cell?
Golgi Bodies
Ribosomes
Mitochondria
None of these
Total number of amino acids in plants is
10
20
30
Plenty
Haemoglobin is dissolved in the plasma of
frog
fish
man
earthworm
Blood clotting requires vitamin
A
B
C
K
Rate of mutation can be increased in plants by
More manure
More pesticides
X-ray
More light
Human blood is oxygenated and purified in the
heart
lungs
liver
kidneys
Saliva flows at the sight of food. This action is
involuntary
voluntary
a reflex
causative
Pacemaker is the
Sinu-auricular node
Auriculo-ventricular node
Bundle of His
Purkinje fibres
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
Temperature treatment which shortens the vegetative period and hastens the flowering is called
Phototropism
Photoperiodism
Vernalisation
Thermoregulation
Which one of the ecosystems Is the largest in the world?
forests
rivers
deserts
oceans
A child goes on vomiting profusely and develops symptoms of diarrhoea. Chances are that in the child's blood serum there is a drop In
calcium
iron
sodium
phosphorus
The juice from the leaves of ________ is used for the treatment of diarrhoea, cholera and dysentery.
Caeselpinea
Bryophyllum
Centella
None of the above
One of the following is called a feminine hormone. Which one is it?
Oestrogen
Testosterone
Pituitrin
Thyroxine
Those small organisms which float on the surface of water are called
Necton
pH indicators
Plankton
Benthos
The genetic code DNA is carried from the nucleus to Ribosome by
t-RNA
r-RNA
S-DNA
ATP
The pigment which is responsible for blood clotting is
Fibrinogen
Haemoglobin
Glucose
Blood cells
In phototropism, auxins
Promote growth of cells
Inhibit cell division
Inhibit growth of cells
Stimulate differential growth of cells
Formation of blood
Histolysis
Histogenesis
Haemopoiesis
Haemolysis
One of the sequences given below represents a complete metamorphosis. Which one is it?
Egg - adult
Egg - nymph - adult
Egg - larva - pupa - adult
young one adult
The geotropism of the roots that makes them grow towards gravity is said to be
positive
negative
neutral
oblique