The bacteria are living unicellular and are prokaryotes. This means that its genetic material, a double-stranded circular DNA molecule, is free in the cytoplasm, not enclosed within a nucleus. Given that microfossils and stromatolites (fossil colonies of bacteria mixed with minerals) have been found in sediments from various geological eras, and even in sedimentary rocks over 3.5 billion years old, bacteria are […]

15 Examples of Biofuels

The biofuel or biofuels are substances product mixture of organic matter (biomass), harvestable energy value provided with motors or internal combustion systems. They are also known as ” agrofuels “, since most of them come from the use of products derived from agriculture, such as corn or cassava, and to avoid the positive feature of the prefix “bio-“, since they are also a source […]

20 Examples of Biodegradable

The adjective biodegradable qualifies those materials, natural or synthetic, that decompose by the action of common biological agents, generally until they are transformed into simple molecules that are compatible with life, such as water and carbon dioxide. This means that biodegradable materials are all those that can be destroyed by microorganisms such as insects, bacteria or fungi. Advantages of biodegradable products […]

Examples of Bioelements (and their function)

Bioelements are elements that are present in all living things. The main function of elements is to help the body where they are to survive. Each cell is made up of different biomolecules (nucleic acids, proteins, lipids, carbohydrates, etc.). In turn, each of these biomolecules is made up of many atoms (oxygen, nitrogen, sulfur, phosphorous […]

Types Of Biomes And Their Characteristics

A  biome is a region of the Earth’s surface that presents similarities in terms of climate, flora, and fauna, thus constituting areas identified by the set of ecosystems predominant in them. Also called biotic area or bioclimatic landscape. In this way, taking into account their basic and determining characteristics, such as latitude, temperature, height, soils, and rainfall, it is […]

Fatty Acids

The fatty acids are biomolecules lipid constitution constituting the elementary component of the fat. They are made up of carbon chains that have a carboxyl group, with a carbon number usually even: generally 16 to 22 carbon atoms.   This quantity of atoms contributes to the metabolism of eukaryotes since fatty acid chains are synthesized and degraded by the addition or elimination of acetate units. Fatty […]

Types of digestion

What is digestion? Digestion is the process of breakdown of large food molecules into small water-soluble food molecules so that they can be absorbed into the watery of blood plasma. In special organisms, these smaller substances are absorbed with the help of the small intestine into the blood stream. DIGESTION OF FOOD I MOUTH Mechanical […]

Types of living organisms on the basis of mode of nutrition

Types of living organisms on the basis of mode of nutrition Living organisms can be divided into two groups on the basis of their mode of nutrition. Autotrophic organisms Heterotrophic organisms Autotrophic organisms or autotrophs Definition Organisms that can prepare their own food from inorganic raw materials taken from their surrounding area known as autotrophic […]

Types of Teeth

What are the different types of teeth? Teeth are the organs that perform mechanical digestion in the mouth or oral cavity. There are different types of teeth some of them are incisors, canines, first molars, and second molars. Each tooth has four types of surfaces. Milk teeth: at about 6 months of age the first set of teeth appears. […]


What is a gaseous exchange? Exchange of oxygen and carbon dioxide between the environment and living organisms is known as a gaseous exchange. It is a very important process that supplies the required gases to the cells for metabolic processes and also removes the waste of the gases produced by the metabolic processes during respiration. […]