Biology Quiz 7

Progesterone is not a vaccine, it is a hormone released by the ovaries. BCG (bacille Calmette-Guerin) is a vaccine for tuberculosis (TB) disease. The anti-rabies vaccine is a vaccine used to prevent rabies. Polio vaccines are vaccines used to prevent poliomyelitis.

Silverfish (Lepisma saccharinum) is not a fish but an insect. It is a species of small, primitive, wingless insect in the order Zygentoma (formerly Thysanura). Its common name derives from the insect's silvery light grey colour, combined with the fish-like appearance of its movements.

A diuretic, also called water pill, is a medicine which promotes the secretion of urine. It is a medication designed to increase the amount of water and salt expelled from the body as urine.

Nerve cell is the longest cell in the human body. It is made of billion neurons. The largest cell in the human body is ovum (egg cell). Smallest cell in the human body is gametes (sperm cell). The largest cells is an egg cell of ostrich.

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.

Bleaching powder is used in drinking water as a disinfectant. It is an active agent which is used to kill germs and bacteria in drinking water. The main content of the bleaching powder is the Chlorine element which acts as the main disinfectant material.

What 1 to 2 percent of the solar energy is trapped and utilised by the plants. Most solar energy occurs at wavelengths unsuitable for photosynthesis. Between 98 and 99 percent of solar energy reaching Earth is reflected from leaves and other surfaces and absorbed by other molecules, which convert it to heat.

Leukocytes are the blood corpuscles that help to build up resistance against diseases. White blood cells (WBCs), also known as leukocytes, are responsible for protecting the body from infection. As part of the immune system, WBCs circulate in the blood and respond to injury or illness.

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.

Trypanosomiasis, also known as sleeping sickness, is caused by microscopic parasites of the species Trypanosoma brucei.