When fertilization take place in plants ?
Pollen grain die before germinate on the stigma
Pollen grains have to land on the stigma before they loose viability
Pollen is released before the stigma becomes receptive
All incorrect
........and..........is example showing external fertilization
What is the chromosome number in meiocyte of potato ?
Which of the following statements is incorrect ?
$(i)$ Bamboo species flower only once in their life time, generally after $50-100$ years and produce large number of fruits and die.
$(ii)$ In animals, the juvenile phase is followed by morphological and physiological changes prior to active reproductive behaviour.
$(iii)$ The reproductive phase is of same duration in all organisms.
$(iv)$ Juvenile phase is the period of growth between the birth of an individual till it reaches reproductive maturity.
$A-$ Events after the formation of zygote are called post fertilization events
$R -$ In viviparous animals a young one develops out side the mother body
Identify the given figure :