does leaf size affect the rate of photosynthesis?
91218
No; instead, it is size of the stoma that affects the rate of photosynthesis and water uptake.
65111
I believe that actually the leaves of plants in the shade are more pale then in the sunlight, not darker. That's because the chlorophil which contained in leaves are not fully used for photosynthesis. The less of usage, the more pale the leaves would be. Probably u know that the leaves look greener if they have enough sunlight.
699887
Smoke which has m;ore co2,to some extent increase the rate of photosynthesis theoretically.But as per Emerson enhancement effect the rate never goes up continuously as other factors effect the rate.\nOn the other hand the pollutant in the smoke like some metals close the stomata and interfere in the respiration  or decrease the rate of respiration
419431
B.\n\nCellular respiration uses Oxygen and releases CO2, and at Nighttime, Photosynthesis cannot occur(since there is a lack of light) and therefore cannot convert CO2 to O2, hence lowering the concentration
241478
it would depend on the other substances in the leave becasue some sea weeds have other subsutances which can work at depth: however land plants will not work as chlorophyll is the only substance to pass its energy on to other processes - the other substances just pass the energy on to the chlorophyll - Just read an AQA A A2 level text book
562904
Heliotropic Leaf Movements in Plants\n\nMany plant species, especially those in the Leguminosae and Malvaceae have the ability to orient their leaves in relation to the sun's direct rays. These movements can be classified as tracking the sun (diaheliotropism), or avoiding the sun (paraheliotropism). Tracking the sun maximizes the amount of direct solar radiation a leaf recieves, while paraheliotropism reduces the amount a leaf receives. These leaf movements are not growth movements, rather they are rapid, reversible movements in response to turgor changes in cells in an organ at the base of the leaf petiole called a pulvinus. Many desert annuals, plants that grow in response to unpredictable rains show heliotropic movements. These tracking movements can increase radiation interception, photosynthesis and growth rates - advantageous properties in an ephemeral environment. Some of these annuals also show paraheliotropism in response to water stress, thus, extending life by reducing leaf temperatures and water loss as soils dry out.\n\nThis is an animation constructed frompictures taken every 5 minutes over a 45 minute span. A soybean (Glycine max) leaf was held horizontally under a bright light. The leaf rapidly moves into a vertical position (paraheliotropism). The pictures were put in reverse order at the end of the animation to show the complete cycle of movement.
15201
The leaves on any tree/plant work mainly as the energy center to enhance the food supply of the plant.  Photosynthesis is the primary action within the leaves, not the storage of water.  The roots, and the trunk of the tree maintain the water.\n\nSo when a tree looses it's leaves it simply maintains it's primary surface, ie trunk and branches, by storing the water within the lower roots, and within the innermost section of the trunk.
851726
Sunlight is necessary for plants to grow, and to provide energy to warm the earth's atmosphere. Light intensity controls plant growth. Light duration affects plant flowering and animal/insect habits.\n\nNow, during photosynthesis, sunlight energy is used to power chemical reactions that combine water with the air's carbon dioxide to form starchy carbohydrate. In other words, during photosynthesis, sunlight energy is stored in carbohydrate for later use. Here's the simplified chemical formula for photosynthesis:\n\n6CO2 + 12H2O + sunlight ---> 6O 2 + C6 H12O 6 + 6H2 O\nor...\ncarbon dioxide + water + sunlight ---> \noxygen + carbohydrate + water \n \n\nSome carbohydrate remains in the leaf but mostly it's transported elsewhere in the plant, perhaps into the stem, or maybe into special underground storage areas, such as the potato plant's potatoes.
53124
At the speed of light... than the chloroplast from the plant turn it into energy
168209
No. In fact not every one of them. The cells which make up the roots of the plants do not because they are not designed for the process of photosynthesis.
881285
The leaves (or whatever is green) on the plant make photosynthesis from sunlight---our sun gives its strongest, most energetic light in green---which is why our plant world is green---- to absorb the sun's green light the best. Water and minerals come up the roots. We breathe oxygen and exhale carbon dioxide, plants breathe cabon dixoide and exhale oxygen. Cool, isn't it?\n\nSome plants in the desert have the abiity to generate new leaves in just a day or two when it rains. Rainwater has nitrogen  \n\nThe overall equation for photosynthesis is deceptively simple. \n\n6CO2 + 6H2O + light energy = C6H12O6 + 6O2\n\nThe product of photosynthesis is a carbohydrate, such as the sugar glucose, and oxygen which is released to the atmosphere. 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. This chemical reaction is catalyzed by chlorophyll acting in concert with other pigment, lipid, sugars, protein, and nucleic acid molecules. Sugars created in photosynthesis can be later converted by the plant to starch for storage, or it can be combined with other sugar molecules to form specialized carbohydrates such as cellulose, or it can be combined with other nutrients such as nitrogen, phosphorus, and sulfur, to build complex molecules such as proteins and nucleic acids.
969379
Both speed up at high temperatures and slow down at low temperatures. Photosynthesis does have a maximum cutoff temperature (usually 30 C in temperate plants and I think 40 C in tropical C4 plants).
734392
Depends on the plant. Some plants grow faster than others.
166015
In general sunlight is necessary for plant growth, however this is not always the case.  Parasitic plants, such as Rafflesia and Dodder, do not require sunlight because they get all the nutrients they need from another plant (Rafflesia, for example, attaches itself to the roots of liana plants) and do not need to undergo photosynthesis at all.  So, I would say the general case is that light is necessary for plant growth but that there are some notable exceptions.
650881
Photosynthesis is the process of converting light energy to chemical energy and storing it in the bonds of sugar. This process occurs in plants and some algae (Kingdom Protista). Plants need only light energy, CO2, and H2O to make sugar. The process of photosynthesis takes place in the chloroplasts, specifically using chlorophyll, the green pigment involved in photosynthesis. \n\n Photosynthesis takes place primarily in plant leaves, and little to none occurs in stems, etc. The parts of a typical leaf include the upper and lower epidermis, the mesophyll, the vascular bundle(s) (veins), and the stomates. The upper and lower epidermal cells do not have chloroplasts, thus photosynthesis does not occur there. They serve primarily as protection for the rest of the leaf. The stomates are holes which occur primarily in the lower epidermis and are for air exchange: they let CO2 in and O2 out. The vascular bundles or veins in a leaf are part of the plant's transportation system, moving water and nutrients around the plant as needed. The mesophyll cells have chloroplasts and this is where photosynthesis occurs.The parts of a chloroplast include the outer and inner membranes, intermembrane space, stroma, and thylakoids stacked in grana. The chlorophyll is built into the membranes of the thylakoids. \n\nChlorophyll looks green because it absorbs red and blue light, making these colors unavailable to be seen by our eyes. It is the green light which is NOT absorbed that finally reaches our eyes, making chlorophyll appear green. However, it is the energy from the red and blue light that are absorbed that is, thereby, able to be used to do photosynthesis. The green light we can see is not/cannot be absorbed by the plant, and thus cannot be used to do photosynthesis. \n\nThe overall chemical reaction involved in photosynthesis is: 6CO2 + 6H2O (+ light energy)  C6H12O6 + 6O2. This is the source of the O2 we breathe, and thus, a significant factor in the concerns about deforestation.\n\n  \n\n\nThere are two parts to photosynthesis: \n\nThe light reaction happens in the thylakoid membrane and converts light energy to chemical energy. This chemical reaction must, therefore, take place in the light. Chlorophyll and several other pigments such as beta-carotene are organized in clusters in the thylakoid membrane and are involved in the light reaction. Each of these differently-colored pigments can absorb a slightly different color of light and pass its energy to the central chlorphyll molecule to do photosynthesis. The central part of the chemical structure of a chlorophyll molecule is a porphyrin ring, which consists of several fused rings of carbon and nitrogen with a magnesium ion in the center. \n The energy harvested via the light reaction is stored by forming a chemical called ATP (adenosine triphosphate), a compound used by cells for energy storage. This chemical is made of the nucleotide adenine bonded to a ribose sugar, and that is bonded to three phosphate groups. This molecule is very similar to the building blocks for our DNA. \nThe dark reaction takes place in the stroma within the chloroplast, and converts CO2 to sugar. This reaction doesn't directly need light in order to occur, but it does need the products of the light reaction (ATP and another chemical called NADPH). The dark reaction involves a cycle called the Calvin cycle in which CO2 and energy from ATP are used to form sugar. Actually, notice that the first product of photosynthesis is a three-carbon compound called glyceraldehyde 3-phosphate. Almost immediately, two of these join to form a glucose molecule. \n\nMost plants put CO2 directly into the Calvin cycle. Thus the first stable organic compound formed is the glyceraldehyde 3-phosphate. Since that molecule contains three carbon atoms, these plants are called C3 plants. For all plants, hot summer weather increases the amount of water that evaporates from the plant. Plants lessen the amount of water that evaporates
351720
The leaves of a plant play an important role in the plant. The leaves capture sunlight and use it along with carbon dioxide to produce food for the plant. Tthe process gives off oxygen. The leaves also store the food for future uses. The leaves have stomata for the escape of the not needed oxygen.
884803
the rate of photosynthesis can be determined by measuring the rate of either O2 production or CO2 uptake. For right method to determine the rate of O2 produced during photosysnthesis refer the link.\nhttp://web.grinnell.edu/courses/bio/qubitmanual/Labs/PHS/pho.html.