Let us explain the external factors affecting photosynthesis:
- The external factors affecting photosynthesis include environmental factors like availability of sunlight, temperature,...
- Factors available at suboptimal levels help in determining the rate of photosynthesis at any point.
- Some of the factors which affect the photosynthetic rate are as follows: (i) Light a)...
What factors speed up or slow down the rate of photosynthesis?
The main factors affecting rate of photosynthesis are light intensity, carbon dioxide concentration and temperature. Additionally, what makes photosynthesis speed up or slow down? Answer and Explanation: The environmental factors that speed up or slow down the rate of photosynthesis are the availability of sunlight and carbon dioxide and the
Which factor least influences the rate of photosynthesis?
The rate of photosynthesis increases when light gets brighter.
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What factors will decrease photosynthesis?
what three factors affect the rate of photosynthesis
- GCSE Biology – Factors Affecting the Rate of Photosynthesis #35
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Which factor will decrease photosynthesis?
Reasons Why Photosynthesis Is Important:
- It is the number one source of oxygen in the atmosphere.
- It contributes to the carbon cycle between the earth, the oceans, plants and animals.
- It contributes to the symbiotic relationship between plants, humans and animals.
- It directly or indirectly affects most life on Earth.
- It serves as the primary energy process for most trees and plants.
What are the 4 factors that affect photosynthesis?
Photosynthesis is affected by light, temperature, water, and CO2. Stomata affect the process of transpiration and do not affect photosynthesis.
What are the 5 factors that affect photosynthesis?
10 Major Factors Affecting PhotosynthesisThe following points highlight the ten major factors affecting photosynthesis. The factors are: 1. Light 2. ... Light Intensity:Photo-Oxidation:Light Quality:Duration of Light Period:Carbon Dioxide Supply:Absorption of Carbon Dioxide:Carbon Dioxide Concentration:More items...
How can the rate of photosynthesis be increased?
1:455:37GCSE Biology - Factors Affecting the Rate of Photosynthesis #49YouTubeStart of suggested clipEnd of suggested clipAnd this means that there must be something else limiting photosynthesis such as carbon dioxideMoreAnd this means that there must be something else limiting photosynthesis such as carbon dioxide concentrations or temperature we can draw a similar graph for carbon dioxide. As carbon dioxide is one
What is the rate of photosynthesis?
The rate of photosynthesis is a gross measure of the rate at which a plant captures radiant energy and fixes it in organic carbon compounds. However, it is often more important to consider, and very much easier to measure, the net gain.
What are the 7 factors that affect photosynthesis?
Table of ContentsFactor # 1. Temperature:Factor # 2. Carbon Dioxide Concentrations:Factor # 3. Light:Factor # 4. Intensity:Factor # 5. Quality:Factor # 6. Duration:Factor # 7. Oxygen:Factor # 8. Water:More items...
What are the most important factors that affect photosynthesis?
The main factors affecting rate of photosynthesis are light intensity, carbon dioxide concentration and temperature.
What are the factors that affect photosynthesis Class 10?
External factors that affect the rate of photosynthesisTemperature.Soil pH levels.Light intensity.Climatic conditions.Carbon dioxide concentration.
What are the factors affecting photosynthesis Class 11?
Factors affecting photosynthesis are:Carbon dioxide – increase in the concentration of carbon dioxide can enhance the rate of photosynthesis.The intensity and quality of light affects the rate of photosynthesis.Photosynthesis is affected by temperature. ... Aeration is necessary for photosynthesis.More items...
Factor One: Sunlight
Sunlight in an essential ingredient to photosynthesis. Without sunlight, there is no photosynthesis. For this reason, light is one of the most important factors in photosynthesis.
Factor Two: Temperature
Temperature affects photosynthesis. If it’s too hot, or too cold, photosynthesis rates will drop. Again, different species will have different tolerances.
Factor Three: Water
Water is another key ingredient to photosynthesis. So, it’s only natural that without water a tree cannot photosynthesise. But, it’s not that straightforward.
Factor Four: Nutrients
Trees need adequate nutrition if they are to have all the tools necessary to photosynthesise. Different nutrients contribute to the formation of different parts of a tree.
What is the rate of photosynthesis?
The rate of photosynthesis is defined as the rate of oxygen production per unit mass of green plant tissues or per unit weight of total chlorophyll. The factors affecting photosynthesis refers to those factors which either increase or decrease the rate of photosynthesis by increasing or decreasing their concentration level.#N#The factors affecting photosynthesis are of two kinds- Internal (or plant) and External (or environmental) Factors. An understanding of these factors affecting photosynthesis is essential in order to understand the rate of photosynthesis.
Why does the rate of photosynthesis decrease after ageing?
But after this, the rate of photosynthesis decreases because of ageing and senescence that brings about the deactivation of enzymes and degeneration of chlorophyll. (vi) Hormones: The hormones like auxins, cytokinins and gibberellins stimulate photosynthesis.
What are the External Factors Affecting Photosynthesis?
These factors generally include environmental factors like availability of sunlight, temperature, the concentration of carbon dioxide and water.
What are the cardinal points of photosynthesis?
Before 1905, early scientists attempted to determine the effect of individual factors on the photosynthetic rate in terms of minimum, optimum and maximum values which are known as cardinal points. The simultaneous effects of other factors also have an importance in determining the rate of photosynthesis.
What law of limitation is used to study the rate of photosynthesis?
For studying the external factors affecting the rate of photosynthesis, it is essential to have a knowledge of Blackman’s Law of Limiting Factors.
What determines the rate of photosynthesis?
All kinds of processes that take place in the plant body are controlled by one or more factors. Thus, the factors affect ing photosynthesis determine the rate of photosynthesis which in turn determines the yield of plants.
Which law explains the factors of photosynthesis?
Ans: Blackman’s Law of Limiting Factors is the best law that explains the factors of photosynthesis.
How does light affect photosynthesis?
Light intensity affects the rate of photosynthesis. The light intensity fluctuates during the day, and will also be affected by the weather. The rate of photosynthesis will change with the time of day.
Why do plants grow in shady areas?
Plants grown in shady places increase the chlorophyll content of their leaves so that they can absorb the necessary light energy required for photosynthesis.
What is the compensation point of a shade-adapted plant?
For shade-adapted plants, the compensation point is lower - their rate of photosynthesis will exceed the rate of respiration at lower light intensities than the plants adapted to sun. previous.
What temperature do plants need to be to grow?
Temperature. Plants can photosynthesise over a wide range of temperatures from 0°C to around 50°C. The optimum temperature for most plants is 15°C to around 40°C. Temperature affects the rate of photosynthesis in crop plants and affects where certain crops can be grown.
Why is water important in plants?
Most important is its role as a solvent for all the chemical reactions in cells.
Does photosynthesis change during the year?
The rate of photosynthesis will also change during the year in countries like the UK.
Light Intensity and Photosynthesis
During photosynthesis there are two sets of reactions, the light-dependent reactions and the light-independent reactions. The light-dependent reactions are the first step of photosynthesis and are used to generate the energy needed to create sugar molecules during the light-independent reactions, called ATP and NADPH.
CO2 and Photosynthesis
Carbon dioxide is a reactant in photosynthesis and is used during the light-independent reactions. During the light-independent reactions carbon dioxide is fixed into a three-carbon sugar that will ultimately form glucose using ATP and NADPH generated in the light-dependent reactions.
Temperature and Photosynthesis
There is an optimal temperature for photosynthesis depending on the climate of the plant. Plants can thrive in a wide variety of temperatures, and thus different types of plants have different optimal temperatures. For example, plants that live in the desert will have a higher optimal temperature than plants that live in the taiga.
How does photosynthesis affect the rate of respiration?
Accumulation of photosynthate in the plant cells, if not translocate, slows down and finally stops the process. The accumulated products increase the rate of respiration. Sugar is also converted into starch and the accumulation of starch in chloroplasts reduces their effective surfaces and the process slows down.
What is the limiting factor of photosynthesis?
Nearly 0.032% by volume of carbon dioxide is present in the atmosphere and at this low level it acts as a limiting factor. Under laboratory conditions when light and temperature are not limiting factors, increase in CO 2 concentration in the atmosphere from 0.03% to 0.3-1% raises rate of photosynthesis.
Why is the Calvin cycle temperature dependent?
The reason being that all the reactions of the Calvin cycle are temperature dependent and the rate of diffusion of CO 2 to the chloroplasts is accelerated by high temperature. Temperature range at which optimum photosynthesis can occur, varies with the plant species.
What temperature does photosynthesis occur?
Temperature: When CO 2, light and other factors are not limiting, the rate of photosynthesis increases with a rise in temperature, over a range from 6°C to about 37°C. Above this temperature, there is an abrupt fall in the rate and the tissue dies at 43°C.
What is the optimum temperature for a time factor?
The optimum temperature for the maximum falls between 20-30°C. Above 25-30°C the maximum rate is not maintained as the time factor begins to operate and the optimum temperature is reduced from 37°C to 30°C.
What temperature do lichens and conifers produce?
For instance some lichens can photosynthesize at 20°C while conifers can assimilate at 35°C. On the other side certain blue green algae and bacteria inhabit hot springs and can perform photosynthesis at 70°C. Similarly, cacti can also carry on photosynthesis at 55°C.
What is the action spectrum of photosynthesis?
The action spectrum for photosynthesis in leaves shows two major peaks, one in the red and the other one in the blue (Fig. 14-1). In these regions, chlorophylls absorb maximal light. Most effective wavelengths differ with different plants.
Why is the rate of photosynthesis affected by temperature?
The rate of photosynthesis is also affected by temperature because the reactions of photosynthesis are controlled by specific enzymes. At low temperatures photosynthesis happens more slowly. A limiting factor is a factor that can limit the rate of photosynthesis if it is in short supply.
Why do paraffin lamps increase photosynthesis?
The use of paraffin lamps inside a greenhouse increases the rate of photosynthesis because the burning paraffin produces carbon dioxide as well as heat. previous. 1. 2. Page 2 of 2. next. up. down.
Why do we need a greenhouse?
A greenhouse can be used to overcome the limiting factors of photosynthesis. This allows plants to grow faster as they are making more food.
How to measure the rate of photosynthesis?
In this experiment the rate of photosynthesis is measured by counting the number of bubbles rising from the cut end of a piece of Elodea or Cabomba.
How many KB is the student sheet Investigating factors affecting the rate of photosynthesis?
Download the student sheet Investigating factors affecting the rate of photosynthesis (76 KB) with questions and answers
What axis is the bubble rate on a graph?
g Plot data on a line graph. The values for the factor being varied should be on the x-axis, and the mean bubble rate in bubbles / minute should be on the y axis.
Can a filter affect light intensity?
Colour of light. Coloured filters can be used, but these will affect light intensity by different amounts depending on the colour.
What Are The Internal Factors Affecting photosynthesis?
Blackman’s Law of Limiting Factors
What Are The External Factors Affecting photosynthesis?
- Let us explain the external factors affecting photosynthesis: 1. The external factors affecting photosynthesis include environmental factors like availability of sunlight, temperature, the concentration of carbon dioxide and water. 2. Factors available at suboptimal levels help in determining the rate of photosynthesis at any point. 3. Some of the factors which affect the phot…
Summary About Factors Affecting Photosynthesis
- The process through which plants transform solar energy into chemical energy in the form of food is known as photosynthesis. Photosynthesis is the optimal mechanism for a living entity that lacks the capacity to actively move around in search of food. Photosynthesis is equally crucial for the food web’s consumers, and it serves as the beginning point for all ecological food chains. A…
Frequently Asked Questions (FAQs) on Factors Affecting Photosynthesis
- Let us look at some of the frequently asked questions on internal and external factors affecting photosynthesis: Q.1. Name the factors affecting photosynthesis. Ans:The top five factors affecting the rate of photosynthesis are chlorophyll content of leaves, the internal structure of leaves, light intensity, carbon dioxide concentration, and tempera...