Organism

2.1. Biocellulose definition Cellulose is the main component of plant cell wall. Some bacteria produce cellulose (called biocellulose or bacterial cellulose). Plant cellulose and bacterial cellulose have the same chemical structure (Fig.2.1), but different chemical and physical properties (Lin et al., 2016). The molecular formula of bacterial cellulose (C6H10O5)n is the same as that of plant cellulose, but their chemical and physical features are different. Biocellulose is preferred over the…

1. Why is the cell theory significant (don’t just state the tenets, explain what it means and why it is a theory)? The cell theory is significant because of it’s three basic ideals or principles. The first is that all organisms are made from cells. This means that cells are the building blocks of life and technically, all of life is connected and related to each other by this tenet. In addition, by researching and examine one type of cell, the results can be assumed for all similar types of…

Animals testing has its flaws as humans and animals’ organisms are not the same. Even experimentation with mammals, the closest animal type from humans, can led us to a failing in the prediction of toxic effects of drugs. Thus, animal testing is a waste of effort and money. The scientific process consists on…

Viruses are nonliving, microscopic organisms that cannot be seen with the naked eye. Since they do not have the ability to replicate by themselves, viruses must rely on a host organism which allows the virus to multiple. This is why they are often referred to as cellular parasites. Since they are very small, and they can only be seen by looking through a microscope. There are approximately 5,000 different viruses that have the potential to infect plants, animals, and bacteria. Some are…

hours. The growth of bacteria is the orderly increase of all the chemical constituents of the bacteria. Multiplication is the consequence of growth as well as nutrients in growth media must contain all the elements necessary for the synthesis of new organisms. While different types of bacterium have varying diets; they all require nutrients to provide energy. Energy is necessary to fuel work inside the cell. Many bacteria use the carbon, nitrogen, phosphors or sulfur from their nutrient source…

of different species to interbreed and produce a fertile, viable hybrid. The morphological species concept: The morphological species concept classifies species on a basis of body type, structure, shape and anatomy. It can be used to classify organisms, prokaryotes and plants that reproduce asexually included. The ecological species concept: The ecological species concept defines a species as a population of individuals that share the same ecological niche. This definition also…

the classification of living things. (Art. 1) When an organism’s characteristics do not quite fit into the fungus, plant, or animal kingdoms, they get classified into the Protist kingdom.(Article 1)”When scientists can’t figure out where to put organisms that do not match with the characteristics of a particular kingdom, they are placed in the Protista Kingdom. “All protist have cells with a nuclei. All protist live in moist environment. All protist are Eukaryotic, they can be unicellular or…

Conditions required for bacterial growth and therefore their reproduction are referred to as Extrinsic and Intrinsic factors. Bacteria can grow anywhere in the world including animals and plants, depending on their characteristic, type and so on. Knowing that, it seems like bacteria can grow everywhere once they have correct conditions. However there are a lot of factors that can affect bacterial growth. The factors affecting bacterial growth are the internal and external conditions of the…

the variety of organisms that make up a community It has two components: • SPECIES RICHNESS: is the total number of different species in the area • RELATIVE ABANDANCE: is the proportion each species represents in that certain measured area. we recognize three types of biodiversity 1.genetic diversity 2.species diversity and 3.ecosystem diversity ( COUNTRY LIFE ,April 2011.) Species diversity means a measurement of species richness and evenness as well as the variety of organisms…

to compare DNA of viruses to other organisms. Studies at the molecular level have revealed relationships between viruses infecting organisms from each of the three domains of life and viral proteins that pre-date the divergence of life and thus the last universal common ancestor (Mahy, 2009). Viruses are infectious, microscopic agents. They are not alive by themselves. They require a host cell. Viruses can only replicate inside the living cells of an organism. The virus takes over the…