Plant Nutrition Quiz 1

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.

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.

Broad and flat leaves maximize absorption of sunlight, thereby increasing rate of photosynthesis.

During photosynthesis, carbon dioxide combines with water in the presence of sunlight to produce glucose. Oxygen is formed as a by-product.

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.

The word equation for photosynthesis is as follows:

Carbon dioxide + water  ——-→   Glucose + Oxygen

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.

Solar energy is trapped by chlorophyll in green plants and stored as chemical energy in carbohydrates produced during photosynthesis.

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.