Which type of plant has one seed leaf?

The type of plant that has one seed leaf is a monocot. Monocots, or monocotyledons, are characterized by having a single cotyledon, which is the first leaf that appears during germination. This feature is a defining characteristic that differentiates them from dicots, which have two seed leaves.

Monocots typically include plants such as grasses, lilies, and orchids. The structure of their leaves, which often have parallel venation, and their flowering parts, usually in multiples of three, are additional aspects of their biology that align with having a single cotyledon.

Understanding the distinction between monocots and dicots is important since it can influence various biological and ecological aspects related to plant life, such as nutrient management, photosynthesis, and growth patterns.