BBC - Gardening - Gardening With Children - Photosynthesis photosynthesis. Most plants are really lucky they don t have to go out shoppingfor their food or spend time cooking it. They just sit around in our http://www.bbc.co.uk/gardening/gardening_with_children/didyouknow_photosynthesis
Extractions: Welcome, create your own unique bbc.co.uk member name and password Why become a member? Returning members Enter member name Enter password Forgotten your password? Remember me What does this mean? Most plants are really lucky - they don't have to go out shopping for their food or spend time cooking it. They just sit around in our gardens waiting for sunshine and then they make their food themselves. Find out how . . . Plants A breath of fresh air Interesting facts They use the sunlight and the green in their leaves to make sugars from carbon dioxide (which they breathe in through their leaves during the day) and water. This sugar is then used to give the plant energy so that it can grow. This process is called photosynthesis and is the most important process on the planet, as many other plants and animals depend on plants to survive. Most of the energy is used to make new plant material, although some of it is stored by the plant for use during the months when there is less sunlight. During the night, plants breathe in oxygen. This is called respiration. The plant also needs minerals to grow, which the plant takes from the soil where they are dissolved in water. The plant releases any water that it doesn't need into the air through its leaves. This is called transpiration.
Photosynthesis photosynthesis Process by which green plants and some bacteria manufacture Through photosynthesis, plants are able to make some of their own food this http://www.tiscali.co.uk/reference/encyclopaedia/hutchinson/m0030839.html
Extractions: Process by which green plants and some bacteria manufacture carbohydrates from water and atmospheric carbon dioxide, using the energy of sunlight. Photosynthesis depends on the ability of chlorophyll molecules within plant cells to trap the energy of light, in order to split water molecules, giving off oxygen as a by-product. The hydrogen of the water molecules is then used to reduce carbon dioxide to simple carbohydrates.
Great Plant Escape - Plant Parts photosynthesis is special to green plants! photosynthesis supplies food for theplant and oxygen for other forms of life. A green plant helped make the http://www.urbanext.uiuc.edu/gpe/case1/c1facts2c.html
Extractions: Leaves are the food making factories of green plants. Leaves come in many different shapes and sizes. Leaves can be simple , made of a single leaf blade connected by a petiole to the stem (oak, maple), or compound , in which the leaf blade is divided into separate leaflets attached by a petiole to the stem (ash, locust). Leaves are made to catch light and have openings to allow water and air to come and go. The outer surface of the leaf has a waxy coating called a cuticle which protects the leaf. Veins carry water and nutrients within the leaf. Leaves are the site of the food making process called photosynthesis . In this process, carbon dioxide and water in the presence of chlorophyll (the green pigment) and light energy are changed into glucose (a sugar). This energy rich sugar is the source of food used by most plants. Photosynthesis is special to green plants! Photosynthesis supplies food for the plant and oxygen for other forms of life.
Photosynthesis / Plants In Action LaserDisc photosynthesis / plants In Action photosynthesis photosynthesis is a processthat enables green plants to use the sun s energy to live and grow, http://www.buyindies.com/listings/7/5/AIMS-7520.html
Extractions: Description: PHOTOSYNTHESIS: Photosynthesis is a process that enables green plants to use the sun's energy to live and grow, make our food, some of our clothes and the wood in our homes. Through Photosynthesis, some of the sun's energy enables us to live. PLANTS IN ACTION: Plant movements are quite complex, but they usually go unnoticed. Using time-lapse photography, this film shows the activity of plants growing and responding to changes in their environments. Details
Leaf_anatomy photosynthesis is the process by which plants make sugars and other nutrients.The phloem conducts these nutrients, which are made in the leaves, http://www.fairchildgarden.org/EduProfDev/Leaf_anatomy.html
Extractions: Answer: Leaves have pores called stomata on the epidermal layer of the leaf. Stomata are the openings through which plants respire. The stomata are flanked by two guard cells, which control the size of stomatal openings. Guard cells thus regulate the flow of gas and water between the leaf and its environment. Plants typically close their stomata at night to avoid too much water loss. Stomata are usually found on the underside of the leaf in terrestrial plants. Some floating aquatic plants, like water lilies, have the stomata located on the upper side of the leaf. Submerged aquatic plants do not have stomata. Even though leaves are very thin to the naked eye, if you looked at a cross section of a leaf under a microscope you would see several cell layers. The top most layer of a leaf is called the upper epidermis. This protects the leaf and may be covered by a waxy cuticle. The next layer is the palisade mesophyll, which is a layer of closely packed cells that perform photosynthesis. The third layer is the spongy mesophyll, a layer of loosely packed photosynthetic cells. Finally, the bottom layer is called the lower epidermis and contains the guard cells with stomatal openings.
Newton's Apple: Teacher's Guides Without enough sunlight, plants cannot use the process of photosynthesis toproduce food. Materials Discover if plants need soil for photosynthesis. http://www.tpt.org/newtons/9/phytosy.html
Extractions: Show Number 907 How do plants make food? David learns why plants are green and how water is transported in plants. DISCUSSION Of all the organisms in the natural world, green plants are the only ones that manufacture their own food. This process is called photosynthesis and begins when light strikes the plant's leaves (both sunlight and artificial light can power this process). Cells in the plant's leaves, called chloroplasts , contain a green pigment called chlorophyll which interacts with sunlight to split the water in the plant into its basic components. Carbon dioxide enters the leaf through holes called stomata and combines with the stored energy in the chloroplasts through a chemical reaction to produce a simple sugar. The sugar is then transported through tubes in the leaf to the roots, stems and fruits of the plants. Some of the sugar is used immediately by the plant for energy; some is stored as starch; and some is built into a more complex substance, like plant tissue or cellulose. Fortunately for us, plants often produce more food than they need, which they store in stems, roots, seeds or fruit. We can obtain this energy directly by eating the plant itself or its products, like carrots, rice or potatoes. Photosynthesis is the first step in the food chain which connects all living things. Every creature on earth depends to some degree on green plants.
Biology Of Animals & Plants - Photosynthesis An Online Introduction to the Biology of Animals and plants Photosynthesisbreaks down into a LightDependent Reaction and a Light-Independent Reaction. http://faculty.fmcc.suny.edu/mcdarby/Animals&PlantsBook/Plants/01-Photosynthesis
Extractions: THE BASIC NEEDS FOR PHOTOSYNTHESIS Plants, as well as some Protists and Monerans, can take small molecules from the environment and bind them together using the energy of light. The incoming light energy is transformed into the energy holding the new molecules together, and the organisms use those molecules as an energy "fuel." The basic process can be represented this way: CO + H O light C H O + O In the case of water organisms, the carbon dioxide and water are from their immediate surroundings; for most land plants, the water is absorbed from the soil and the carbon dioxide from the atmosphere. The glucose is used for two major purposes: 1) it serves as an energy reserve for periods of darkness (don't forget that photosynthesizers, like any living things, require energy and get it through
Extractions: This micro-unit was created by Linda W. Crow (Baylor College of Medicine, Houston) Cell Chemistry: Metabolism, Enzymes, and Photosynthesis. (a) Students should observe and describe chloroplasts of lant cells, the site of photosynthesis. They should demonstrate that they understand how cells in green plants trap sunlight and convert light energy into the energy of sugar, giving off oxygen as a byproduct. The energy in sugar then becomes available for use by plants and all other living organisms. (Biology, A Framework for High School Science Education, p. 89.) (b) Students should understand the process of photosynthesis in terms of reactants and products. (Earth and Space Sciences, A Framework for High School Science Education, p. 153.) Most cell functions involve chemical reactions. Food molecules taken into cells react to provide the chemical constituents needed to synthesize other molecules. Both breakdown and synthesis are made possible by a large set of protein catalysts, called enzymes. The breakdown of some of the food molecules enables the cell to store energy in specific chemicals that are used to power the many functions of the cell. Plant cells contain chloroplasts, the site of photosynthesis. Plants and many microorganisms use solar energy to combine molecules of carbon dioxide and water into complex, energy rich organic compounds and release oxygen to the environment. This process of photosynthesis provides a vital connec-tion between the sun and the energy needs of living systems.
Photosynthesis 1 Without a photosynthetic source of ATP, plants would be using up their ATP to make The adaptive advantage of CAM photosynthesis is that plants in arid http://waynesword.palomar.edu/photsyn1.htm
Extractions: 1. Fluorescence In A Chlorophyll Solution Left: A transparent-green chlorophyll solution of ground up spinach leaves and acetone. Right: Beam of light directed at the chlorophyll solution producing a reddish glow called fluorescence. A 2. Simplified Illustration Of A Mitochondrion Illustration of a mitochondrion. The inner membrane forms a series of inwardly-projecting folds called cristae. Electrons from glucose are shuttled through a cytochrome transport system along the membranes of the cristae. During this electron transport process, ATP is generated by a complex chemical mechanism known as chemiosmosis. Most of the ATP in animal cells is generated within the mitochondria. Plants can also generate ATP by a similar mechanism along thylakoid membranes of their chloroplasts. T he structure of adenosine monophosphate, an RNA nucleotide containing the purine base adenine, is very similar to ATP (adenosine triphosphate), except that ATP has three phosphates (PO
Lesson Plan Grade Level 3 Subject photosynthesis Title plants and Food ObjectivesThe photosynthesis process and the parts of a plant. http://www.brainpop.com/teachers/lessonplans/messages_live/live46.weml
Photosynthesis - Definition Of Photosynthesis In Encyclopedia photosynthesis is the process by which these autotrophs (such as plants, Photosynthetic plants play an important role in the carbon cycle. http://encyclopedia.laborlawtalk.com/Photosynthesis
Extractions: Leaves are the primary sites of photosynthesis Photosynthesis is a biochemical process in which plants green algae , and some bacteria use the energy of light to combine water and carbon dioxide into oxygen and glucose . It nourishes nearly all living things directly or indirectly, making it vital to life on Earth. Contents showTocToggle("show","hide") 1 What is photosynthesis? 7 References Plants green algae , and some bacteria are autotrophs , which means that they they sustain themselves without eating other organisms or substances derived from other organisms. Autotrophs produce their raw organic molecules from carbon dioxide (CO ) and other inorganic raw materials derived from the environment. Photosynthesis is the process by which these autotrophs (such as plants, green algae and some bacteria) use the energy contained in sunlight to split carbon dioxide and water , and recombine them into oxygen gas and a sugar called glucose . Glucose (C H O ) is a simple molecule that is used by autotrophs for many things, such as
The Standards Site: Plants And Photosynthesis Science at key stage 3 (Year 9). Unit 9C plants and photosynthesis about photosynthesis as the key process producing new plant biomass http://www.standards.dfes.gov.uk/schemes2/secondary_science/sci09c/?view=get
ASPB - Education - STOMATA & PHOTOSYNTHESIS - Chapter 12 The generation of oxygen by photosynthesis in water plants can be shown in anadditional experiment where gas bubbles are formed in the water. http://www.aspb.org/education/lab_photosyn.cfm
Extractions: B. Learn about some of the factors associated with photosynthesis. Biology Background The simplest biochemical expression of the synthesis of organic compounds from carbon dioxide (CO2) by photosynthesis is given by the following equation. Of course, in the absence of light there is no energy source for photosynthesis and there is no assimilation of carbon dioxide. The failure to find sugars and starch in the absence of light is the basis of this experiment. Uptake of CO2 by leaves presents a special problem to land plants. Because carbon dioxide is available in the atmosphere around plants and photosynthesis takes place in the cells of leaves, CO2 must move from the atmosphere to inside leaves. To admit CO2 into leaves, leaves have small pores in their surfaces called stomata.
ASPB - Publications - Biochemistry & Molecular Biology Of Plants plants employ the C3 photosynthetic pathway (Calvin cycle) to fix CO2, using thekey enzyme Rubisco Variants of C3 photosynthesis exist in many plants. http://www.aspb.org/publications/biotext/sumrys/ch12.cfm
Extractions: Chapter Photosynthesis Photosynthesis produces organic compounds from inorganic carbon by using the energy of sunlight. These processes are carried out in plants, algae, and various bacteria. In all cases, the photosynthetic reactions may conveniently be divided into two phases, the light reactions and the carbon-fixing reactions. In the case of eukaryotic organisms, photosynthesis takes place in the chloroplast. This organelle is surrounded by a double membrane and contains a complex internal membrane system, the thylakoid membranes. The two phases of photosynthesis take place in different regions of the chloroplast, with the light reactions being localized to the thylakoid membranes and the carbon-fixing reactions occurring in the stroma. in a series of redox reactions mediated by both mobile and integral membrane components of the photosynthetic electron transfer chain, located primarily in the thylakoid membranes. During this series of reactions, PSII oxidizes water, producing molecular oxygen. This reaction provides almost all of the oxygen required for aerobic life on our planet.
Extractions: Included: We've raked up a pile of activities for you to "leaf" through! It's fall! That means shorter days and cooler nights. And, in many parts of the United States, it means that trees will soon shed their leaves after a final colorful salute to summer. Trees that drop their leaves each fall are called deciduous trees. You might ask your students why they think dentists refer to baby teeth as "deciduous teeth"? See if your students can figure out the connection! And here's another question for your students: Did you know that a tree's leaves are orange and yellow even in summer? Most leaves include the pigments of all three colors. It's just that the pigment chlorophyll (the pigment that makes the leaves green) is a much stronger pigment than the others. It covers the yellow (xanthophyll) and orange (carotene) pigments that are natural to a tree's leaves. But, come fall, a tree's leaves produce less chlorophyll. Now the other colors can show through. And that they do in brilliant explosions of color!
Earth's Birthday Project | Gardens Indoors & Out photosynthesis a function or activity of green plantsis the production ofsugar and pure oxygen from light, water, and air. Although only plants can http://www.earthsbirthday.org/butterflies/gardens/photosynthesis.asp
Extractions: PHOTOSYNTHESIS a function or activity of green plantsis the production of sugar and pure oxygen from light, water, and air. Although only plants can photosynthesize, all animals are dependent on sugars and starches created by plants: all animals eat plants. . .or they eat other animals that eat plants. . .or they eat other animals that eat other animals that eat plants. Simple Summary Plants capture a part of the air and a part of water. They combine these into a new material: sugar! This sugar is the plants' own food. They eat it and grow. Human beings and other animals also eat sugars made by plants. For example, the next time you eat a carrot, notice how sweet it tastes. We human beings are dependent on photosynthesis for every morsel of food we consume, from salad and bread to roast chicken and chocolate milk.
Extractions: Press Office News Releases Media page ... News Archive News Plants growing in the tops of forest canopies are able to survive thanks to a special type of ânight-timeâ photosynthesis, according to latest research by Oxford plant scientists, recently published in Proceedings of the National Academy of Sciences USA PNAS These plants, called epiphytes, have a relatively stressful existence, even in tropical rain forests, as they can be exposed to the severe drying effects of full sunlight, high temperatures and continual air movement. Researchers at Oxfordâs Department of Plant Sciences and the Smithsonian Tropical Research Institute have now found that many of them possess a special type of photosynthesis known as crassulacean acid metabolism (CAM). This enables plants to conduct most of their gas exchange with the atmosphere at night, when the air is relatively cool and humid, rather than during the day as in most plants. By studying a large family of plants called bromeliads â which includes terrestrial species like pineapple as well as epiphytic species such as Spanish moss â the researchers have found that CAM photosynthesis is surprisingly widespread in this group. Having sampled approximately two-thirds of the 3000 species in this family, the researchers estimate that nearly half of all bromeliads possess CAM photosynthesis. Further, by conducting an analysis of evolutionary relationships amongst the bromeliads, the researchers infer that CAM photosynthesis has arisen multiple times within this family, most likely in response to geological and climatic changes in the late Tertiary.
Teachers' Domain: Photosynthesis Still, it seems remarkable that plants have evolved photosynthesisthe ability photosynthesis is the process by which plants transform water and carbon http://www.teachersdomain.org/6-8/sci/life/stru/photosynth/
9(l) Primary Productivity Of Plants Sugars created in photosynthesis can be later converted by the plant to starch The total energy fixed by plants in a community through photosynthesis is http://www.physicalgeography.net/fundamentals/9l.html
Extractions: ONLINE TEXTBOOK GLOSSARY ... ABOUT CHAPTER 9: Introduction to the Biosphere (l). Primary Productivity of Plants Introduction The bodies of living organisms within a unit area make up a standing crop of biomass More specifically, biomass can be defined as the mass of organisms per unit area and is usually expressed in units of energy (e.g., joules m ) or dry organic matter (e.g., tons ha or grams m ). Most of the biomass in a community is composed of plants, which are the primary producers of biomass because of their ability to fix carbon through photosynthesis . This chemical reaction can be described by the following simple formula: O light energy C H O The product of photosynthesis is a carbohydrate , such as the sugar glucose , and oxygen which is released into the atmosphere ( Figure 9l-1 ). All of the sugar produced in the photosynthetic cells of plants and other organisms is derived from the initial chemical combining of carbon dioxide and water with sunlight (
4(e) Food Chain As An Example Of A System Through photosynthesis the plants convert the radiant energy into energy richorganic matter. Some of the energy fixed by the plants is passed on to http://www.physicalgeography.net/fundamentals/4e.html
Extractions: ONLINE TEXTBOOK GLOSSARY ... ABOUT CHAPTER 4: Introduction to Systems Theory (e). Food Chain as an Example of a System A food chain models the movement of energy in an ecosystem (a form of environmental system). Figure 4e-1 below illustrates the movement of energy in a typical food chain. In this diagram, we begin the food chain with 100,000 units of light energy from the sun . Note, the amount of energy available at each successive level (called trophic levels ) of this system becomes progressively less. Only 10 units of energy are available at the last level ( carnivores ) of the food chain. A number of factors limit the assimilation of energy from one level to the next. We will examine these factors later in this textbook. The sun is the original source of energy, in the form of light, for the food chain.