1 Identify the various parts of a typical flower and give their functions. 2  Relate the sequence of events that give rise to microspores and megaspores. 3  Describe the development of the male and female gametophyte.  Describe the double fertilization that occurs uniquely in the flowering-plant life cycle.
Codenamed Operation Overlord, the battle began on June 6, 1944, also known as D-Day, when some 156,000 American, British and Canadian forces landed on five beaches along a 50-mile stretch of the heavily fortified coast of Franceâs Normandy region.
Vitamin D: Why It's Important. Vitamin D is a fat soluble vitamin that plays a vital role in the human body. It has many functions, and a lack of vitamin D can lead to many health problems. Bone Growth. Vitamin D is essential in bone growth.Its main role in the body is to increase the flow of calcium into the bloodstream.ithout vitamin D, calcium would not be absorbed into the body. Therefore, vitamin D is equally important to the maintenance of bone health as is calcium. Extreme deficiency of vitamin D during childhood results in a disease called rickets.