Biology Quiz 8

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.

Non-conventional energy (also known as Renewable energy) sources are sources that are renewed by natural processes on a continual basis. Energy generated by using wind, solar, small hydro, tides, geothermal heat and biomass is known as non-conventional energy. Hydroelectric power is a renewable energy source. It uses the energy of running water, without reducing its quantity, to produce electricity.

Typhoid is not transmitted via blood transfusion. It is a highly contagious disease that's mostly spread through fecal contamination of food and water.

Dengue viruses (DENV) are the causative organism of dengue fever. They are transmitted to humans through the bite of an infected Aedes species mosquito.

A snake has a maximum number of ribs. On each vertebra on a snake is a set of ribs, just like a human. Humans have 24 ribs that protect the important organs within, as well as provide structure to house those organs. Snakes have two ribs attached to every single vertebra that they have, meaning that a snake with 200 vertebrae would have 400 ribs.

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

Among the given options, Mollusc plasma bears the smallest living cell. Mycoplasma is the smallest living known cell. It is prokaryotic, devoid of a cell wall and can live without oxygen. It is pathogenic to both plants and animals.

Keratin is a type of structural protein which makes the skin layer impervious to water. It is found on epithelial cells, which line the inside and outside surfaces of the body. Keratins help form the tissues of the hair, nails, and the outer layer of the skin.

Glaucoma is a disease of the eyes. It is a group of eye conditions that damage the optic nerve, the health of which is vital for good vision. This damage is often caused by abnormally high pressure in the eye.

Polycyclic hydrocarbons (PAHs) are the constituents of automobile exhaust that can cause cancer. PAHs are ubiquitous environmental pollutants generated primarily during the incomplete combustion of organic materials (e.g. coal, oil, petrol, and wood). These PAHs are carcinogenic in nature i.e. leads to cancer.