Biology Quiz 4

An artificial ecosystem is not self-sustaining, and the ecosystem would perish without human assistance. An aquarium is an artificial ecosystem. In aquarium, all the factors are regulated according to choice. These factors are type of species, food, sunlight and temperature, etc. Without humans, this ecosystem could not sustain itself.

The human body is home to millions of microorganisms (microbes). Some microbes make us sick, others are important for our health. The most common types are bacteria, viruses, protozoa and fungi. Viruses are the most adaptable and versatile microorganisms. Viruses can do nothing until they enter a living cell but when enter a living cell they would be able to multiply.

A polymer is a substance or material consisting of very large molecules, or macromolecules, composed of many repeating subunits. polyethylene (alse known as Polythene) is a light, versatile synthetic resin made from the polymerization of ethylene.

Soybean and groundnut are the two richest known sources of edible protein. The protein content of soybeans is 36–56% and groundnut is 22-30% of the dry weight. Soybean protein is known as a complete protein as it provides all of the essential amino acids for human nutrition.

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

Hepatitis is a viral disease caused by hepatitis viruses A, B, C, D, and E. It infects liver cells and causes inflammation.

The vector of disease sleeping sickness is tsetse fly. Sleeping sickness (African Trypanosomiasis) is caused by microscopic parasites of the species Trypanosoma brucei. It is transmitted by the tsetse fly (Glossina species).

Competition for food, light and space is most severe in closely related species growing in the same area or niche. It is most severe in closely related species growing in the same habitat as these species will have the same niche, type of food they eat and same characteristics, etc.

Methyl bromide (CH₃Br) damages the ozone layer once released into the atmosphere. It is also toxic and harmful to humans and fauna if not used carefully. Methyl bromide is an odorless, colourless gas used to control a wide variety of pests in agriculture, including fungi, weeds, insects, nematodes (or roundworms), and rodents.

Human kidney disorder is caused by the pollution of Cadmium. Heavy metals (mercury, lead, cadmium) are among the best-known environmental pollutants causing kidney disease.