What is the process of photosynthesis in plants?
The process During photosynthesis, plants take in carbon dioxide (CO 2) and water (H 2 O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose.
What happens to carbon dioxide during photosynthesis?
The process During photosynthesis, plants take in carbon dioxide (CO 2) and water (H 2 O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose.
What does the presence of starch in leaves indicate?
The presence of starch in leaves indicates the occurence of photosynthesis. Q. Which one of these sets of apparatus can be used to test for the presence of starch in leaves? Figure ... Q. Copy these sentences in your notebook and complete them. Leaves carry out photosynthesis..
How does photosynthesis affect life on Earth?
Most life on Earth depends on photosynthesis .The process is carried out by plants, algae, and some types of bacteria, which capture energy from sunlight to produce oxygen (O 2) and chemical energy stored in glucose (a sugar). Herbivores then obtain this energy by eating plants, and carnivores obtain it by eating herbivores.
How can we test the occurrence of photosynthesis?
In many labs on photosynthesis, students test leaves for starch to see if photosynthesis has occurred. To do the starch test, leaves are placed in boiling water for 1 minute, then in boiling reagent alcohol until the chlorophyll is removed, and finally in an iodine solution.
What causes photosynthesis to occur?
The Sun! The energy from light causes a chemical reaction that breaks down the molecules of carbon dioxide and water and reorganizes them to make the sugar (glucose) and oxygen gas. After the sugar is produced, it is then broken down by the mitochondria into energy that can be used for growth and repair.
Which of the following substances present in leaves indicates the occurrence of photosynthesis?
The presence of starch in leaves indicates the occurrence of photosynthesis.
Where does photosynthesis occur?
chloroplastsIn plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.
What are the 3 main factors of photosynthesis?
The main factors affecting rate of photosynthesis are light intensity, carbon dioxide concentration and temperature.
What energy source causes photosynthesis?
In photosynthesis, solar energy is harvested as chemical energy in a process that converts water and carbon dioxide to glucose. Oxygen is released as a byproduct. In cellular respiration, oxygen is used to break down glucose, releasing chemical energy and heat in the process.
What part of the plant cell is responsible for the occurrence of photosynthesis?
In plants and algae, which developed much later, photosynthesis occurs in a specialized intracellular organelle—the chloroplast. Chloroplasts perform photosynthesis during the daylight hours. The immediate products of photosynthesis, NADPH and ATP, are used by the photosynthetic cells to produce many organic molecules.
Why the presence of starch in leaves indicates the occurrence of photosynthesis?
Starch is a white and powdery substance. It houses glucose, which plants use for food. The presence of starch in a leaf is reliable evidence of photosynthesis. That's because starch formation requires photosynthesis.
What main substance is present in the leaf that is essential for photosynthesis?
Chlorophyll is a pigment that gives plants their green color, and it helps plants create their own food through photosynthesis.
Where does the most photosynthesis occur in a leaf?
Cells in the mesophyll of the leaf have numerous chloroplasts. In leaves, cells in the mesophyll (the tissue between the upper and lower epidermis) are uniquely suited to carry out photosynthesis on a large scale. This is due to their high concentration of chloroplasts, which are the sites of photosynthesis.
What are the 4 factors that influence 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 of photosynthesis?
There are four factors which are necessary for the process of photosynthesis, water, carbon dioxide, sunlight, and chlorophyll. Chlorophyll pigments are present in the plant, carbon dioxide is obtained from the atmosphere, water is absorbed from the soil by the roots.