Biology Quiz 6

The fluid part of blood without corpuscles is called Plasma. Blood plasma is fluid part of blood in which corpuscles (blood cells) are absent, but contains proteins and other constituents of whole blood in suspension. Plasma is the largest part (about 55%) of blood.

Cloves are the aromatic dried flower buds of a tree in the family Myrtaceae, Syzygium aromaticum.

A biopsy test is typically associated with the diagnosis of cancer. Doctors use biopsies to test whether abnormalities in the body are caused by cancer or by other conditions.

The huge muscles that power the wings attach to a flat part of the breastbone called the keel. Some flightless birds, including ostriches, do not have a keel.

Emphysema kills more people than lung cancer as a consequence of air pollution. It is a condition that involves damage to the walls of the air sacs (alveoli) of the lung. Alveoli are small, thin-walled, very fragile air sacs located in clusters at the end of the bronchial tubes deep inside the lungs.

AIDS is a viral disease caused by Human immunodeficiency virus (HIV). When a person becomes infected with HIV, the virus attacks and weakens the immune system. As the immune system weakens, the person is at risk of getting life-threatening infections.

Saliva helps in the digestion of starch (complex carbohydrates). It contains special enzymes called amylase that help digest the starches in food. Amylase breaks down starches into sugars, which the body can more easily absorb.

Araneology is the study of spiders. It is the scientific study of arachnids, which comprise spiders and related animals such as scorpions, pseudoscorpions, and harvestmen. The raising of bees is known as apiculture. The study of aphids is known as aphidology. Acarology is the study of mites and ticks.

Charles Darwin (1809-1882) and Alfred Russel Wallace (1823-1913) were contemporary naturalists who proposed a similar theory of organic evolution. Wallace greatly admired On the Origin of Species. In turn, Darwin regarded Wallace as the one man who truly understood the idea of evolution by natural selection.

Pulmonary Vein brings clean blood from the lungs into the heart. Its function is to transport oxygenated blood from the lung alveoli into the left atria.