But it was not until 1928 that penicillin, the first true antibiotic, was discovered by Alexander Fleming, Professor of Bacteriology at St. Mary's Hospital in London.
Answer:
Lactation, secretion and yielding of milk by females after giving birth. The milk is produced by the mammary glands, which are contained within the breasts. breast-feeding; lactation. A mother holding and breast-feeding her newborn baby girl.
Explanation:
Hope it is helpful....
It is called a semi-permeable membrane. Most eukaroytic cells have this.
The erosion or disintegration of rocks, building materials, etc., caused by chemical reactions (chiefly with water and substances dissolved in it) rather than by mechanical processes. HOPE THIS HELPS!! :)
