A cell is the smallest unit of life able to control its own activities, BUT, it relies on the rest of the organism (if multicellular) or the surroundings (if unicellular) to provide it with raw materials i.e. nutrients and removal of waste material. The different parts of a cell are r...
In most plants the cotyledons are brought out of the testa and above the ground where they become green and make food by photosynthesis. The cotyledons eventually fall off, usually after the first foliage leaves have been formed. The cotyledon leaves bear no resemblance to the foliage leaf, ...