How does the pollen grains of Vallisneria protect themselves?

How do the buds protect themselves?

Study of pollen grains is called

Where the pollen grains are produced?

How are the stored grains damaged?

Mention how have plants developed mechanical and chemical defence against herbivores to protect themselves with the help of one example of each.

True and False Type Questions Inner wall of the pollen grain is composed of celliulose and pectin.

How do pollen grains affect the life of human beings?

Short Answer Questions Three mark Each QUESTION FROM STATE BOARD EXAMINATIONS How does the pollen mother cell develop into mature pollen grain? Illustrate the stages with labelled diagrams.

How does a transgenic plant of tobaaco protect it self from nematode parasites?