Biology Online Quiz

Gregor Mendel formed the Laws of Heredity (the Law of Segregation and the Law of Independent Assortment) from his pea plant experiments.

By mass, about 96 percent of the human body is made up of just four elements: oxygen (65 percent), carbon (18.5 percent), hydrogen (9.5 percent), and nitrogen (3.3 percent). Oxygen (O) together with hydrogen form water, which is the primary solvent found in the body and is used to regulate temperature and osmotic pressure.

Yawning occurs when CO₂ concentration in the blood is high, and Oxygen (O₂) concentration is low. The yawn acts as a boost to the O₂ levels.

Oral contraceptives (birth control pills) are used to prevent pregnancy. Estrogen and progesterone are two female sex hormones. Combinations of estrogen and progesterone work by preventing ovulation (the release of eggs from the ovaries).

Germplasm bank is meant for the ex-situ conservation of various species. Ex-situ conservation is the technique of conservation of all levels of biological diversity outside their natural habitats through different techniques like zoo, captive breeding, aquarium, botanical garden, gene bank and Germplasm banks.

Carbohydrates can be divided into three main categories: sugar, fiber and starch. Starches are the most commonly consumed type of carbohydrate. Cereal grains and root vegetables are a rich source of starches.

Omega-3 and 6 fatty acids are also called essential fatty acids. Coconut oil does not contain essential fatty acids. It is a highly beneficial healthy fat but does not actually contain Omega fatty acids. Sunflower oil, Mustard oil and Groundnut oil contain essential fatty acids.

An antibiotic is a chemical synthesized by a micro-organism against another micro-organism. It is a medicine which is used for destroying bacteria and curing infections. The term antibiotic, coined in 1942, describes any substance produced by a microorganism, and subsequently by chemical synthesis, that is antagonistic to the growth of other microorganisms.

Cloves are commonly used as a spice. They are the dried flowers of the tree Syzygium aromaticum.

It is the nerve tissue where no cell division occurs after birth. Cell division is the process by which a parent cell divides into two daughter cells with the same genetic material. There are two types of cell division: mitosis and meiosis. There is absence of centrioles in the nerve cells and because of this they are unable to perform mitosis and meiosis and hence these cells do not divide.