Identify “X” and choose the correct combination of plots provided in the following table.
X
Description
Function
(a) Chlorophyll
A green coloured pigment
Essential for photosynthesis
(b) Chloroplast
A cell organelle
Conducts photosynthesis
(c) Vascular bundle Vascular tissue
Transportation in plants
(d) Chloroplast A
Green coloured pigment
Essential for photosynthesis
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Answer:
c-vascular bundle
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Explanation:
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'X' is
(b) Chloroplast
A cell organelle
Conducts photosynthesis
Chloroplast: Chloroplast, structure within the cells of plants and green algae that is the site of photosynthesis, the process by which light energy is converted to chemical energy, resulting in the production of oxygen and energy-rich organic compounds. Photosynthetic cyanobacteria are free-living close relatives of chloroplasts; endosymbiotic theory holds that chloroplasts and mitochondria (energy-producing organelles in eukaryotic cells) are descended from such organisms.
Characteristics of chloroplasts are-
- Chloroplasts are a type of plastid, which is a round, oval, or disk-shaped body involved in food synthesis and storage.
- The presence of two pigments, chlorophyll a and chlorophyll b, distinguishes chloroplasts from other types of plastids by their green color.
- These pigments absorb light energy as part of the photosynthesis process. Other pigments, such as carotenoids, are found in chloroplasts and act as accessory pigments, absorbing solar energy and passing it on to chlorophyll.
- Chloroplasts are found in all green tissues of plants, but they are particularly abundant in the parenchyma cells of the leaf mesophyll.
Hence, the 'X' in the figure represents Chloroplast.
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