MCQ
Which of the following statement is applicable for all flowering plants?
- AMonosiphonous pollen tube
- ✓Non-motile and morphologically dissimilar gametes
- CPresence of pollinium
- DDivision of generative cell after pollination
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$I.$ This method is also known as biolistic technique
$II. $ In this method cells are bombarded with high velocity micro-particles of gold or tungsten coated with $DNA$ in plants
$III.$ Important crop plants like maize, rice and wheat have now been transformed by this method
Which of the statements given above are correct?
$R$ : Bark is formed due to the activity of phellogen only.