Autotrophic organisms are called “producers” because they create their own food. The word “autotrophic” in Greek means “self-feeding”. Most autotrophs are green plants‚ algae‚ and some bacteria. A small number of bacteria‚ including the ancient Archaea group are capable of generating food from sulfur or other chemical reactions‚ but the majority of autotrophs rely on sunlight to carry out a process called photosynthesis. In the process of “photosynthesis”‚ specialized molecules capture carbon from
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I. Domain: Bacteria 1. Gram Negative Proteobacteria (Phylum XII) Non-Proteobacteria 2. Gram Positive LOW G+C (Phylum XIII) HIGH G+C (Phylum XIV) II. Domain: Archaea III. Domain: Eukarya (Gram Negative 1. Bordetella pertussis Pertussis/Whooping Cough 2. Eikenella corrodens Human Bite Injury Infection 3. Rickettsia prowazekii
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Human Biology‚ 7e (Johnson) Chapter 1 Human Biology‚ Science‚ and Society 1.1 Multiple Choice Questions 1) The branch of science that studies living organisms and their life processes is A) biology B) geology C) chemistry D) physics Answer: A Topic: Sec. 1.0 Skill: Knowledge/Comprehension 2) The process by which living organisms maintain a fairly constant internal environment despite changes in the external environment is known as A) metabolism B) biology C) homeostasis D) evolution
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Chapter 17 Louis Pasteur’s experiment illustrated that: microbes will not grow in a nutrient broth that has been sterilized unless air is allowed to enter the vessel through an opening. Living organisms can spontaneously generate from nonliving matter. True or False? False The scientists usually given credit for disproving the theory of spontaneous generation of bacteria are: Tyndall & Pasteur Miller and Urey’s experiments attempting to recreate the prebiotic environment produced a rich mixture
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process used by plants and other organisms to convert the light energy captured from the sun into chemical energy that can be used to fuel the organism’s activities. Photosynthesis occurs in plants‚ algae‚ and many species of bacteria‚ but not in archaea. Photosynthetic organisms are called photoautotrophs‚ since they can create their own food. In plants‚ algae‚ and cyanobacteria‚ photosynthesis uses carbon dioxide and water‚ releasing oxygen as a waste product. Photosynthesis is vital for all aerobic life
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products‚ and by enhancing human health; some microbes cause disease II. Members of the Microbial World A. Microbiology is the study of organisms too small to be clearly seen by the unaided eye (i.e.‚ microorganisms); these include viruses‚ bacteria‚ archaea‚ protozoa‚ algae‚ and fungi B. Some microbes (e.g.‚ algae and fungi) are large enough to be visible‚ but are still included in the field of microbiology; while
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of organ systems would form an organism. Different forms of life exist in the planet with human beings. Organisms like plants‚ animals‚ mammals‚ bacteria and many more. These organisms are divided into groups:- Animalia‚ Plantae‚ Protista‚ Archaea‚ Bacteria and Fungi. Respiration is the process of releasing energy from glucose or any other organic material. The chemical energy in glucose is used for growth and movement. But the process of respiration in plants is different to those in animals
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A virus is a small infectious agent that can replicate only inside the living cells of an organism. Viruses can infect all types of organisms‚ from animals and plants to bacteria and archaea.[1] Since Dmitri Ivanovsky’s 1892 article describing a non-bacterial pathogen infecting tobacco plants‚ and the discovery of the tobacco mosaic virus by Martinus Beijerinck in 1898‚[2] about 5‚000 viruses have been described in detail‚[3] although there are millions of different types.[4] Viruses are found in
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accumulating end product slowing down production of that product. 5. Distinguish among the three domains of life. List and distinguish among the 3 kingdoms of multicellular‚ eukaryotic life Bacteria – most diverse and widespread of prokaryotes Archaea – prokaryotes that live in Earth’s extreme environments Eukarya – multicellular organisms K. Plantae – consist of terrestrial multicellular eukaryotes that carry out photosynthesis K. Fungi - organisms that decompose for nutrition K. Animalia
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bacilli and a facultative anaerobe. A facultative anaerobe is when an organism can live in the absence or presence of oxygen. It is also a prokaryote‚ a single celled organism lacking a cell membrane bound nucleus‚ and can be divided into bacteria and archaea. Proteus mirabilis is characterized by their motility‚ its ability to distinguish maltose‚ and its inability to distinguish lactose. Proteus has the ability to stretch itself out and secrete a polysaccharide when in contact with solid surfaces‚ in
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