Final answer:
Plants store starch as sugars in seeds to provide nutrients for the growing zygote. Enzymes break down the starch into smaller molecules for the embryo to utilize. This starch can also be consumed as food by humans and animals.
Step-by-step explanation:
Plants store starch in the form of sugars consisting of amylose and amylopectin, which are both polymers of glucose. The stored starch serves as a source of nutrients for the growing zygote in the seed.
When the seed germinates, enzymes break down the stored starch into smaller molecules like maltose and glucose, which can be utilized by the developing embryo. Additionally, the stored starch in the seed can also be consumed as a food source by humans and animals.