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Biology
Plant Nutrition Quiz 1
Topic 5 Quiz 1
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Category: Plant Nutrition Quiz 1
1) Which process does not result in the return of carbon dioxide to the atmosphere?
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2) How does most carbon dioxide reach the photosynthesizing cells of a green leaf?
Carbon dioxide, which is at a higher concentration in surrounding air, diffuses down a concentration gradient into the air spaces in the spongy mesophyll of the leaves through the stomata at the lower epidermis of leaves.
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3) Which equation represents the chemical changes, which take place during photosynthesis?
During photosynthesis, carbon dioxide combines with water in the presence of sunlight to produce glucose. Oxygen is formed as a by-product.
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4) How does oxygen pass out through the stomata of leaves?
Oxygen produced during photosynthesis is found in higher concentrations in the leaves. It will diffuse out of the stomata down a concentration gradient into the atmosphere.
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5) Which equation summarizes photosynthesis?
The word equation for photosynthesis is as follows:
Carbon dioxide + water ——-→ Glucose + Oxygen
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6) A child left a toy box on the lawn for two days. When the box was picked up, the grass under it had turned yellow. What caused the grass to change color?
The grass died from lack of food because in the absence of light, photosynthesis could not occur. Without photosynthesis, the chlorophyll starts to decompose, causing the grass to turn yellow.
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7) Which of the following helps a plant to absorb carbon dioxide rapidly?
Carbon dioxide diffuses through the stomata of the leaves. When there is a large surface area, more stomata can be packed in, so that CO2 can be absorbed more rapidly.
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8) Which identifies the function of each type of plant cell?
Palisade cells are filled with chloroplasts for photosynthesis. Phloem cells transport sugar and dissolved mineral salts. Root hair cells are specialized for the absorption of water and dissolved mineral salts.
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9) Which feature helps plants to make most food by the process of photosynthesis?
Broad and flat leaves maximize absorption of sunlight, thereby increasing rate of photosynthesis.
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10) What is the function of chlorophyll?
Solar energy is trapped by chlorophyll in green plants and stored as chemical energy in carbohydrates produced during photosynthesis.
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