What is the first evidence of photosynthesis?

What is the first evidence of photosynthesis?

There is suggestive evidence that photosynthetic organisms were present approximately 3.2 to 3.5 billion years ago, in the form of stromatolites, layered structures similar to forms that are produced by some modern cyanobacteria, as well as numerous microfossils that have been interpreted as arising from phototrophs ( …

Do you have evidence that photosynthesis occurred in leaves explain?

Is there evidence that photosynthesis occurred in leaves? Yes; there were lower carbon dioxide rates when the flashlight was shown because the plant was using the light along with the carbon dioxide in the air to go through photosynthesis.

What evidence proves that photosynthesis evolved before aerobic respiration on earth?

Lacustrine stromatolites in sulphur- and iron-depleted basins strongly suggest that oxygen-producing photoautotrophs had evolved by 2.72 Ga. Thus, these lines of evidence all imply that oxygenic photosynthesis evolved well before abundant molecular oxygen appeared in the environment.

What is the evidence for the production of an oxygenated atmosphere?

The answer is tiny organisms known as cyanobacteria, or blue-green algae. These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen.

What are two stages of photosynthesis?

While there are many steps behind the process of photosynthesis, it can be broken down into two major stages: light-dependent reactions and light-independent reactions.

How does the Bromothymol blue prove that photosynthesis is occurring?

Photosynthesis supplies the chemical energy needed to produce these compounds. When a person exhales, carbon dioxide is released. Bromothymol blue solution, BTB, can indicate the presence of carbon dioxide in the water. When little or no carbon dioxide is present, BTB will show a blue color.

Why is photosynthesis chlorophyll based?

Green plants have the ability to make their own food. They do this through a process called photosynthesis, which uses a green pigment called chlorophyll. Chlorophyll’s job in a plant is to absorb light—usually sunlight. The energy absorbed from light is transferred to two kinds of energy-storing molecules.

What came first photosynthesis or cellular respiration?

Photosynthesis evolved by 3 billion years ago and released oxygen into the atmosphere. Cellular respiration evolved after that to make use of the oxygen.

What are the two reactants and two products for the process of photosynthesis?

During the process of photosynthesis plants break apart the reactants of carbon dioxide and water and recombine them to produce oxygen (O2) and a form of sugar called glucose (C6H12O6).

Which is the end result of photosynthesis?

In short, through the process of photosynthesis CO2 and H20 form new bonds, generating glucose (C6H12O6), releasing oxygen during the process. The end result of photosynthesis is glucose, which serves to store some of the potential energy originally present in the sun.

What are facts about photosynthesis?

– The energy for photosynthesis comes from light. Light energy is converted to chemical energy by chlorophyll. There are two sets of reactions, light dependent and light independent. The process mostly takes place in the chloroplasts of plant leaf mesophyll cells.[1] – Photosynthesis is the process where a plants uses the sun’s energy to turn light into chlorophyll. Plants produce oxygen during this process and utilize carbon dioxide. Photosynthesis is the single most important chemical process on the earth. Almost all plants needs the sun in order to survive.[2] – · Photosynthesis is the most important chemical process on earth – it provides food and energy for all living creatures who eat the plants that rely on this process to produce their food (glucose). · More than half (70\%) of the world’s oxygen is produced by phytoplankton photosynthesis in the world’s oceans.[3]

What are the results of photosynthesis?

Photosynthesis and respiration go hand in hand. The result of photosynthesis is glucose, which is stored as chemical energy in the plant cells. This stored chemical energy comes from the conversion of inorganic carbon (carbon dioxide) into organic carbon. Respiration releases the stored chemical energy.

Which process is an outcome of photosynthesis?

The outcome of light reactions in photosynthesis is the conversion of solar energy into chemical energy that the chloroplasts can use to do work (mostly anabolic production of carbohydrates from carbon dioxide).