Answer the following questions.
Question 1) Define the terms:
i) Megasporogenesis.
ii) Seed dormancy.
iii) Root stem transition.
iv) Annual rings.
v) Structural similarities of phloem and Xylem.
vi) Biodiversity in cacred groves.
vii) Threatened species.
viii) Biofuel plants.
Question 2) Give the account of the structure of the female gametophyte in angiosperms and add a note on the functions of its components.
Question 3) Write in illustrated account of the embryo development in dicots.
Question 4) Give the account of the Gymnoapermous wood and how it differs from that of the angiospermous wood.
Question 5) Explain the anomalous secondary growth in dicots.
Question 6) Write an essay on phytochemicals of commercial significance and give their medicinal inportance.
Question 7) Describe the symptoms, etiology and epodemiology of groundnut rust.