Biology Quiz 3

Mitochondria (singular: mitochondrion) are the power plants of the cells. They transform energy taken up through nourishment into a form the cells can use for a multitude of necessary metabolic reactions.

Casuarina is a xerophyte plant. A xerophyte is a species of plant that has adaptations to survive in an environment with little liquid water, such as a desert or ice-covered region. Popular examples of xerophytes are Casuarina, cacti, pineapple, etc.

Cyanide poisoning causes death in seconds because it breaks the electron transport chain. Cyanide blocks the cellular electron transport mechanism and cellular respiration by inhibiting the mitochondrial ferricytochrome oxidase system and other enzymes.

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.

The human-infective stage of malaria is sporozoites from the salivary gland of an infected mosquito. The sporozoites grow and multiply in the liver to become merozoites.

Biological control is the use of living organisms to maintain pest populations below damaging levels. Predators of a pest, Pheromone traps and neem extracts are used as a Biological control. Pesticides are not used as a Biological control as it is a chemical agents.

Urea and uric acid are the two nitrogenous wastes that are secreted in urine. Urea is the main nitrogenous waste in humans. Urea serves an important role in the metabolism of nitrogen-containing compounds by animals. It is the main nitrogen-containing substance in the urine of mammals. A normal urea level in the urine is 12 to 20 grams over 24 hours.

Germplasm bank is meant for the ex-situ conservation of various species. Ex-situ conservation is the technique of conservation of all levels of biological diversity outside their natural habitats through different techniques like zoo, captive breeding, aquarium, botanical garden, gene bank and Germplasm banks.

Arboreal animals are those animals that spend most of their life on trees. Examples of such animals include chameleons, lizards, green tree pythons, tree snails, koalas, squirrels, cats, monkeys, parrots, etc.

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.