1. What are the substances needed for photosynthesis?
Carbon dioxide, water and light energy.
2. What types of cells make up the mesophyll? Explain their roles in photosynthesis.
images.yourdictionary.com a) palisade mesophyll : contains high density of chloroplast to receive
the maximum amount of light.
b) spongy mesophyll : loosely arrange and have large air spaces
between the cells to allow easy diffusion of water and carbon dioxide
through the leafto the palisade cells.
| PALISADE CELL | SPONGY MESOPHYLL CELL |
| 1. filled with chloroplasts | 1. contain very few chloroplasts |
| 2. closely packed | 2. loosely packed |
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