Directions: The picture below shows a microscopic view of plant cells with a green structure, labeled X. Use the picture to answer any questions that follow.
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The process taking place at X is
a
carbon fixing.
b
photosynthesis.
c
nitrogen fixation.
d
respiration.
b
photosynthesis.
Based on the given picture, the process taking place at the green structure labeled X is photosynthesis.
To determine the process taking place at structure X in the given picture, we can examine the characteristics of the structure and its relation to plant cells.
Firstly, let's analyze the options provided:
a) Carbon fixing: This process involves the conversion of inorganic carbon dioxide (CO2) into organic compounds. While carbon fixation does occur in plants, it primarily takes place in other organelles like the chloroplasts, not at structure X. Therefore, option a can be eliminated.
b) Photosynthesis: Photosynthesis is the process by which green plants, algae, and some bacteria convert sunlight, water, and carbon dioxide into glucose (a simple sugar) and oxygen. Since the green structure X is present in plant cells, it is likely associated with photosynthesis, as the green pigment chlorophyll is responsible for absorbing light energy during this process. Therefore, option b is a possible answer.
c) Nitrogen fixation: Nitrogen fixation is the conversion of atmospheric nitrogen (N2) into ammonia (NH3) or other nitrogen compounds. Although nitrogen fixation is a crucial process in plants, it typically occurs in specialized structures called nodules, which are found in the roots of certain plants, not at structure X. Thus, option c is unlikely.
d) Respiration: Respiration is the process by which cells convert glucose and oxygen into energy (ATP), carbon dioxide (CO2), and water (H2O). While respiration occurs in all living cells, it takes place in mitochondria, not at structure X. Therefore, option d can also be eliminated.
Based on this analysis, the most likely correct answer is option b: photosynthesis.