in temperate and tropical regions all over the world. It ranks among the fastest growing plants on Earth and due to its association with the nitrogen fixing cyanobacteria Anabaena azollae‚ it is independent of extern organic nitrogen. In that way Azolla is not only known to fix huge amounts of carbon‚ but as well to produce vast amounts of organic nitrogen. The nutrient‚ which mainly limits the growth of Azolla‚ is phosphorous. Azolla is rich in protein‚ amino acids‚ vitamins and minerals. It
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| | The most important source of nitrogen entering the body is from: | | | Student Response | Value | Correct Answer | Feedback | A. | nucleic acids. | | | | B. | amino acids contained in dietary protein. | 100% | | | C. | urea. | | | | D. | ammonia. | | | | | Score: | 0.1/0.1 | | | 2. | Quest#2 | | Ammonia is converted to urea in the: | | | Student Response | Value | Correct Answer | Feedback | A. | heart. | | | | B. | brain
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Biological cycles are vital in many aspects of life on earth. From cycles within the body that keep organisms alive such as the cell cycle‚ Krebs cycle and the Calvin cycle to cycles that encompass many aspects of life and our planet such as the Nitrogen and Carbon cycles. The cell cycle involves actively dividing eukaryotic cells passing through a series of stages known collectively as the cell cycle. The two gap phases (G1 and G2) and S (for synthesis) phase‚ in which the genetic material is duplicated
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the yield of ammonia. In the Haber process‚ the nitrogen‚ hydrogen and ammonia are in equilibrium. So five factors that affect the production of ammonia would be: a) Temperature. The reaction is an exothermic reaction‚ meaning it produces heat. The higher the temperature in the reaction chamber‚ the less ammonia is produced‚ as the equilibrium shifts to the right to counteract the heat as it is an exothermic reaction‚ producing more hydrogen and nitrogen gas. But this doesn’t mean that the rate of reaction
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The Neolithic and Industrial Revolutions The two changes in the use of the earth’s resources that had the greatest effect on the world population were the Neolithic and the industrial revolutions. The Neolithic revolution (a.k.a. agricultural revolution) was a change in the way of life of our ancestors. It took place about 8000 years ago among various tribes in Asia and the Middle East. It included a transition from foraging and hunting to the domestication of animals (most probably starting
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Sample Exam 4-Bio 107 1) The layer of the GI tract wall that is responsible for motility is the A) muscularis. B) mucosa. C) serosa. D) submucosa. E) None of the above are correct. Answer: A 2) The process by which undigested material is removed from the gastrointestinal tract is A) secretion. B) urination. C) mechanical processing. D) elimination. E) absorption. Answer: D 3) Once a bolus of food has been formed in the mouth‚ it is passed by the tongue and jaws to the A) esophagus
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BIOENERGETICS ENERGY FLOW AND NUTRIENT CYCLING Ecosystem • It is an area which is self contained and life supporting. • It contains biotic (including plant‚ animal and microorganisms) and abiotic or physical factors (including nutrient cycling). • Examples include: coral reefs‚ deserts‚ savannahs and rain forests. • Several habitats and the communities associated with them make up an ecosystem. http://www.bloggersbase.com/images/uplo aded/original/c622477c9e5a5d2040c71563 31f799b10498611d.jpeg
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to our oceans and streams. This then contaminants the water and uses up the phosphorus that is coming out of the Earth’s Crust. The last cycle discussed was the Nitrogen Cycle. This cycle is needed for many important reasons such as the nitrogen fixation process. This process is also important to humans because of the nitrogen fixation process. But just like the other cycles our everyday practices have greatly harmed
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Chapter 25: Environmental Microbiology Question Type: Multiple Choice 1) Which would not be the habitat for terrestrial species of some microorganisms? a) desert b) tundra c) tropical rain forest d) freshwater lake Answer: d Difficulty: Easy Learning Objective 1: LO 25.1 Explain the concept of ecosystems and how energy flows through them. Section Reference 1: Section 25.1 Fundamentals of Ecology 2. Microbes in the environment can be _____. a) producers b) consumers c) decomposers d) all
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carbohydrates. Leguminous plants and nitrogen-fixation bacteria: Nitrogen-fixing bacteria living in the root nodules of leguminous plants change the atmospheric nitrogen gas into nitrogenous compounds. Functions of leguminous plants: 1. They protect the bacteria. 2. They carry out photosynthesis to make carbohydrates. Functions of nitrogen fixation bacteria It lives inside the root cortex to divide and form swelling nodules. It converts nitrogen gas to form ammonia/nitrogenous compounds
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