教育学习   常速英语

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SPEAKER: There are several ways to test whether someone has been infected with SARS COV-2. Some tests can detect if you have an active infection or an infection that is happening right ...

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SPEAKER: This is the virus SARS-CoV-2. Its name stands for Severe Acute Respiratory Syndrome Coronavirus 2. You may have heard it called just the coronavirus, or COVID-19. Coronaviru...

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G3P, the net product from the Calvin cycle, can be used to generate other organic molecules, such as sucrose or starch. Sucrose produced by leaf cells is transported through the vascula...

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The Calvin cycle takes place in the chloroplast’s stroma, the watery clear fluid surrounding the thylakoids. It’s helpful to think of the Calvin cycle in three phases: fixation, reduction,...

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Lets take a closer look at a chloroplast, the organelle where photosynthesis takes place. Photosynthesis consists of two sets of chemical reactions: the light reactions and the Calvin cyc...

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We are going to zoom in on a cross section of a leaf to have a closer look at the center of action for photosynthesis. A leaf has many different types of cells, such as mesophyll cells,...

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Photosynthesis is a set of chemical reactions in which light energy is converted to chemical energy. Light energy enables the movement of electrons from molecules that donate electrons ...

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[SCRIBBLING] SPEAKER: Almost all life on Earth is solar powered.$#10320#$10320#$ Plants, algae, and some bacteria capture light energy from the sun and convert it to chemical energy in ...