The sunflower embryo has

The correct answer is single cotyledon.

An embryo is the developmental stage of a plant contained within a seed. Cotyledons, also known as embryonic leaves or seed leaves, are the initial leaves formed by the plant embryo. They serve the essential function of storing and providing food and nutrients to the young seedling until it establishes its true leaves and begins photosynthesis.

According to the designated correct answer, the sunflower embryo is described as having a single cotyledon. In botany, plants that possess a single embryonic seed leaf are referred to as monocotyledonous (or monocots). The single cotyledon acts as a structure to absorb and transfer nutrients from the endosperm to the growing embryo during the germination process.