The term "Rh factor" is derived from the Rhesus monkey, in which the protein was first discovered. The Rh factor is a protein that can be present on the surface of red blood cells, and it is named after the Rhesus monkey because the protein was initially identified in Rhesus monkey blood during scientific experiments. The Rh factor is an important component in blood typing and can be either Rh-positive (presence of the protein) or Rh-negative (absence of the protein) in humans.

Mercury and Venus are the two planets in our solar system that do not have any natural satellites (moons).

female sterilization is commonly referred to as tubectomy. Tubectomy is a surgical procedure in which a woman's fallopian tubes are blocked, cut, or sealed to prevent eggs from reaching the uterus for fertilization. This method of permanent contraception is also known as tubal ligation.

As an end product, lactic acid is produced which makes the milk thicker and finally converts it into curd.

The iron minerals that are at present used as ores are hematite, magnetite, limonite, and siderite.

The correct answer is the Glyptal. The term "natural polymers" refers to compounds that are produced naturally. Glyptal is a synthetic polymer and does not exist in nature. The polymer substance formed from glycerol and phthalic acid is known commercially as glyptal.

Thus, a metal used in storage batteries is Lead.

For short durations of time, sounds up to a 120 dB are bearable and also considered safe by the world health organization, but again, listening to sounds at such high frequencies at regular intervals of stretched time durations is totally unsafe and makes the ears vulnerable to permanent hearing loss.