Class 12th Biology 2017 Set1 Delhi Board Paper Solution
Question 11
List the three stages the annuals and biennial angiosperms have to pass through during their life cycle.
Answer
The three states through which the annuals and biennial angiosperms pass during their life cycle are:
(1) Vegetative or Juvenile phase
(2) Reproductive phase
(3) Senescent phase.
A few plant exibhit unusual flowering phenomenon. Such as bamboo species flowers only one in their lifetime.Another plant, strobilanthes kunthiana flowers once in 12 Years.
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