Biology Quiz 6

The human skeleton of an adult consists of around 206 bones. There are typically around 270 bones in human infants, which fuse to become 206 to 213 bones in the human adult.

The syrinx is the vocal organ of birds. It is located at the base of a bird's trachea, where the trachea divides into the bronchi (tubes that connect the trachea with the lungs). It produces sounds without the vocal folds of mammals.

Iodoform, also called triiodomethane, is used as an antiseptic. It is a yellow, crystalline solid belonging to the family of organic halogen compounds, used as an antiseptic component of medications for minor skin diseases.

The main function of white blood cells (WBCs) in the body is to protect the body against disease. WBCs protect the body against infection. As WBCs travel through the bloodstream and tissues, they locate the site of an infection and act as an army general to notify other WBCs of their location to help defend the body from an attack of an unknown organism.

Fat has more than twice as many calories per gram as carbohydrates and proteins. A gram of fat has about 9 calories, while a gram of carbohydrate or protein has about 4 calories.

Smallpox has been eradicated from the world. It was a serious infectious disease caused by the variola virus. World Health Organization (WHO) declared smallpox eradicated in 1980.

BCG (Bacille Calmette-Guerin) is a vaccine for tuberculosis (also known as TB) disease. TB is a serious infection that affects the lungs and sometimes other parts of the body, such as the brain (meningitis), bones, joints and kidneys.

The world's smallest flowering plant is the watermeal, or Wolffia globosa.

The concentration of hemoglobin in blood is decreased in anemia. Hemoglobin is a protein in red blood cells that carries oxygen to the body's organs and tissues and transports carbon dioxide from your organs and tissues back to your lungs. If a hemoglobin level is lower than normal, it means a low red blood cell count (anemia).

Antibiotics are synthetic compounds inhibiting the growth of bacteria. They are medicines that fight bacterial infections. They work by killing the bacteria or by making it hard for the bacteria to grow and multiply.