Here's a breakdown:
* Cacti: Cacti are succulents adapted to arid climates. Their leaves are modified into spines, reducing water loss. They have a specialized, thick, fleshy parenchyma (not spongy palisade) for water storage.
* Pine trees: Pines are conifers adapted to colder climates. They have typical leaf structure, including palisade and spongy mesophyll layers. The palisade layer is responsible for photosynthesis, while the spongy layer helps in gas exchange.
Spongy palisade layers are not a common feature in both cacti and pine trees. They are adapted for very different environments and have evolved distinct structures to thrive in those conditions.