Essential to understanding the life cycle of a plant is the concept of alternation of generations. One of the defining traits of plants is that a single adult plant exists in two separate states, called generations, with differing purposes. The sporophyte generation contains a full set of chromosomes in each cell and produces spores.
SD cards are an extension of MMC memory cards; this means that it's possible to use MMC cards in newer SD devices. It's also possible to use regular SD cards in SDHC and SDXC devices.
1 Applications: Micro SD/TF (T-Flash), M2 (memory stick micro), MS (memory stick)/MS PRO/MS Du/MS PRO Duo, SD (secure digital)/MMC (multi-media card)/SDHC DV.