The Chemistry of Life 3.1 Chemical Elements and Water 3.1.1 State that the most frequently occurring chemical elements in living things are carbon‚ hydrogen‚ oxygen and nitrogen. Carbon‚ hydrogen‚ oxygen and nitrogen are the most frequently occurring chemical elements in living things. 3.1.2 State that a variety of other elements are needed by living organisms‚ including sulphur‚ calcium‚ phosphorus‚ iron and sodium. Other elements are needed by living organisms including sulphur‚ calcium
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for the whole system of Photosynthesis. Chloroplasts are found in mesophyll cells (which are found in the leaves) of green plants. They convert light into energy; therefore the energy is the plant’s food. The chemical in Chloroplast is called ‘Chlorophyll’; this is the chemical that generates the process of photosynthesis. Vacuoles are found in Animal cells as well‚ but they are particularly smaller than and not as big as the one or two large vacuoles found in the Plant Cells. Vacuoles store nutrients
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be appropriate for this habitat. SUN GRASS HARE WOLF 4. How are producers able to produce food? Producers are able to produce food by converting the energy from the sun and nutrients from the abiotic factors to food energy‚ using chlorophyll. This process is called photosynthesis. As a result of this the primary consumers consume the food energy. 5. Explain how the law of conservation of energy is obeyed in a food chain. The law of conservation of energy is being obeyed by the passing
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Eutrophication 2-1 2. EUTROPHICATION This chapter should be read by anyone wanting a brief summary of the causes‚ the impacts and the management of eutrophication. CHAPTER CONTENTS 2.1 2.2 2.3 2.4 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 CAUSES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2.2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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which are organisms without a nucleus and a single chromosome (a double-stranded DNA located in an area of the cell) instead. In the lab‚ organism one is a very small dark green leaf from a small plant. Under the microscope‚ there is a lot of chlorophyll‚ floating around inside the rectangular cells. Organism one
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compare an absorption spectra versus an action spectra for Ps. 4. Discuss why is the narrow area of electromagnetic radiation between 380-750 nm is the best choice to power a process like Ps. 5. Contrast and compare the function of the chlorophyll pigments versus the function of the accessory pigments in Ps. 6. Explain the adaptive value for plants to have their leaves change color in the fall. 7. Contrast and compare the tasks or purposes of the Light Reaction and Dark Reaction
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against the cell wall (pressure helps to support plant). Sometimes it functions as a lysosome. A primary cell wall containing cellulose. This makes the plant a more uniform and gives a regular shape. Plastids such as chloroplasts that contain chlorophyll‚ the pigment that gives plants their green color and allows them to perform photosynthesis. Specialized cell-to-cell communication pathways known as plasmodesmata‚[3] pores in the primary cell wall through which the plasmalemma and endoplasmic
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Bio 100 Lecture Final Study Guide (All answers are true or false) 1. The level of scientific thought that we have the most certainty in is the hypothesis. 2. Controlled science experiments have no validity in biology research. 3. All living things obtain energy from their environment. 4. The four organic macromolecule groups common to all living things are carbohydrates‚ proteins‚ nucleic acids‚ and fats. 5. All living things are composed of one or more cells. 6. Humans are
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Class IX: Biology Chapter 5: The fundamental unit of life. Chapter Notes Key learnings: 1) In 1665‚ Robert Hooke first discovered and named the cells. 2) Cell is the structural and functional unit of all living organisms. 3) Organisms may be unicellular or multicellular. A single cell constitutes the unicellular organism whereas many cells coordinately function in case of multicellular organism. 4) The size‚ shape and volume of the cell are related to the specific function that they
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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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