Chapter 27. BACTERIA & ARCHEA Overview: Prokaryotes thrive almost everywhere‚ including places too acidic‚ salty‚ cold‚ or hot for most other organisms Masters of Adaptation Most prokaryotes are microscopic‚ but what they lack in size they make up for in numbers There are more in a handful of fertile soil than the number of people who have ever lived They have an astonishing genetic diversity Prokaryotes are divided into two domains: bacteria and archaea Structural‚ functional‚ and genetic
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Labset Five Worksheet 1. List five environments where you are likely to find microbial growth: Lakes‚ soil‚ oceans‚ tundras‚ deserts 2. How do microbes contribute to soil fertility? The decomposition that microbes take part in help release mineral nutrients‚ such as potassium and nitrogen‚ from dead organic matter and allowing primary producers the nutritional access. They also produce CO2 and CH4 to release into the soil and atmosphere. 3. Describe the growth you observed in each of your
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Labset One Worksheet 1. Label and describe the function of each of the following parts of the microscope (7) A. The ocular lens/eyepiece transmits and magnifies the image from the objective lens to the eye. B. The body tube transmits the image from the objective lens to the ocular lens. C. The nosepiece is a rotating mount holding many objective lenses. D. The objective lens is the primary lens that gathers as much light as possible from the specimen and brings it to a bright focus
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biogeochemical cycles and the water cycle. Source (major?) of food. Major source of drinking water. Recreational/aesthetic value Photosynthetic organisms (light is essential). Phytoplankton - microscopic‚ floaters. green algae‚ diatoms‚ cyanobacteria. Benthic Plants Submerged (plant fully under water) pond weed‚ muskgrass Emergent (plants partial above water) water lilies‚ cattails Surface Water Non
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Prokaryotic cells are single celled organisms that were formed at the formation of the earth‚ so are the most basic life forms. The prokaryotes are organised in the ‘three domain system’ and include bacteria and blue-green algae. Prokaryotes live in many environments including extreme habitats such as hydrothermal vents‚ hot springs‚ swamps‚ wetlands‚ and the guts of animals. This is a diagram of a prokaryote cell and it shows that they are not very complex cells. They do not contain any membrane
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Midterm 1 stuff (1‚ 25‚ 26‚ 27‚ 28) 2) What characterizes a prokaryotic cell? a. the lack of ribosomes b. the lack of a membrane-enclosed nucleus c. the presence of a nucleus with no DNA d. the presence of mitochondria e. having a cell wall without a cell membrane 3) Which of the following does NOT comprise a logical hierarchy of organization? a. family‚ order‚ class‚ phylum‚ kingdom b. molecules‚ cells‚ tissues‚ organ systems‚ populations c. organisms‚ populations‚ communities‚ biomes
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Lab Summary Diversity One Diversity Two Diversity Three Dylan Palacio Bio 102 Introduction- Throughout the history of man kind one question has been constantly ASKED and never seems to get a definite answer. The question is who are we? And where do we come from? Rather then spark a religious verse science debate and draw a very emotional line in society we let everyone believe what they want to believe. However regardless of what you want to believe facts are facts and science is science. After
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Nitrogen cycle Nitrogen gas is a colourless‚ odourless and non-toxic gas which makes up about 78 percent of the atmosphere. Nitrogen is extremely important to living material; in fact plants‚ animals and humans could not live without it. Sprent (1987) argued that nitrogen cycle is the most important process to living organisms after the carbon cycle. But nitrogen exists as dinitrogen (N2) in the atmosphere‚ which living things‚ particularly plants‚ cannot synthesize (citation) The process of nitrogen
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known as eutrophication and is an increasing problem globally. Algal blooms out compete organisms and decolorize water. Some algae are able to produce toxins known as neurotoxins and are referred to as Harmful Algal Blooms (HAB’s). The cyanobacteria which are blue-green produce harmful toxins which have harmful effects on humans‚ birds‚ shellfish‚ fishes and other marine organisms. A few forms in which HAB’s can occur are red tides and golden tides. Red tides belong to a group of dinoflagelates
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Improvement in food resources Answer the following questions *****1.What is photoperiodism? Ans: Photoperiodism is the effect of duration of sunlight in the day and night cycle on seed germination and flowering in plants. *****2. What are kharif crops? Kharif season crops are rainy season crops. Sowing is done at the beginning of the monsoon season in june to july and the crops are harvested at the end of the monsoon season‚ during September or October. Eg-Rice‚ maize ‚ soybean *******3. What are
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