The growth of pollen tube towards embryo sac is
geotropism
chemotaxis
thigmotaxis
phototaxis
B.
chemotaxis
The growth of pollen tube towards ovary is due to chemical stimulus and is called chemotropism or chemotaxis.
Geotropism is the growth of the parts of plants in response to the force of gravity. The upward growth of plant shoots is an instance of negative geotropism ; the downward growth of roots is positive geotropism.
Thigmotaxis is the motion or orientation of an organism in response to a touch stimulus.
Phototaxis is the bodily movement of a motile organism in response to light, either towards the source of light ( positive phototaxis ) or away from it ( negative phototaxis ).
Vaccines prepared by genetic engineering are safe to man because they are
least active form of virus
active form of virus
coat protein formed as antibody
All of the above
Wildlife is destroyed most when
there is lack of proper care
mass scale hunting for foreign trade
its natural habitat is destroyed
natural calamity
Science of engineering and technology applied to life sciences is
Biotechnology
Genetic engineering
Pathology
Biological science
Which of the following. is generally used in chronic diarrhoea, dysentery, bleeding, piles, leucorrhoea etc?
Quinine
Ephidrine
Chir
Catha
A hyaline bisexual and self-fertilized flower that does not open at all is
chasmogamaus
apogamous
cleistogamous
polygamous
