Tag: science & technology

ECG (electrocardiogram) records electrical activity of the heart to diagnose heart conditions like arrhythmias, heart attacks, and other cardiac problems. It is not used for diagnosing brain, kidney, or lung conditions.

Bronchitis is inflammation of the bronchial tubes that carry air to and from the lungs. The bronchial tubes are part of the respiratory tract, making this a respiratory system condition. It causes coughing and difficulty breathing. Blood, bladder, and liver are unrelated to bronchitis.

Pyorrhea, also known as periodontitis or periodontal disease, is a serious gum infection that damages the soft tissue and bone supporting the teeth. It primarily affects the gums and can lead to tooth loss if untreated. The nose, heart, and lungs are not affected by pyorrhea.

Typhoid and cholera are both caused by bacteria that spread through contaminated water and food. Typhoid is caused by Salmonella Typhi, while cholera is caused by Vibrio cholerae. These are classic examples of water-borne diseases, not airborne infections. Infectious diseases is too broad a category.

Short-sightedness (myopia) occurs when the eye focuses images in front of the retina instead of on it. A concave lens diverges light rays before they enter the eye, pushing the focal point back onto the retina and correcting the vision. Convex lenses are used for farsightedness (hyperopia).

Leukemia is a cancer of the body's blood-forming tissues, including the bone marrow and the lymphatic system. It primarily affects the white blood cells, causing them to grow abnormally and crowd out healthy blood cells. It is not a disease of the lungs, skin, or nerves.

The scientific (biological) name of humans is Homo sapiens, which means 'wise man' in Latin. This binomial name was introduced by Carl Linnaeus in 1758. The prefix 'Homo' refers to the human genus, while 'sapiens' denotes our species within that genus. The other options are not valid taxonomic names.

The scientific name of the domestic cat is Felis catus, where 'Felis' is the genus containing small cats and 'catus' is the species name. This classification was established by Linnaeus in 1758. The other options are made-up combinations that don't represent valid taxonomic names.

The scientific name of the common cobra (Indian spectacled cobra) is Naja naja, where both genus and species names are 'Naja.' This repetition occurs when the species is the type species for its genus. The other options (aja, baja, maja) are not valid taxonomic names.

The scientific name of the domestic dog is Canis lupus familiaris, indicating it's a subspecies of the gray wolf (Canis lupus). The three-part name reflects subspecies classification. The prefix 'Canis' means dog, 'lupus' means wolf, and 'familiaris' denotes domestication. Options A, B, and D contain spelling errors.