Give the term for the entry of pollen tube into the ovule through the chalaza.

Give the term for the entry of pollen tube into the ovule through micropyle.

Give the term for the entry of pollen tube into the ovule through Integuments.

Give the term for the pile of thylakoids.

Give the term for the study of fresh water bodies.

Give the term for change of Spermatid into Sperm.

Give the term for the periodic vaginal bleeding.

Give the term for the extranuclear rings of DNA molecules.

Short Answer Questions Three mark Each QUESTION FROM STATE BOARD EXAMINATIONS With the help of diagrams describe the three possible routes of entry of pollen tube into the ovule.