Executory and Executed Contracts. An executory contract has an act or obligation stipulated in a contract that has yet to be performed by one or more parties to the contract. For example, an equipment lease and a license to intellectual property are examples of executory contracts.
The seed contains and disperses the embryo. Around the whole seed is a layer called the seed coat. This layer may be thick or thin, depending on the species, but it often contains light-sensitive chemicals.When conditions are right -- there is appropriate light and water -- the seed coat may trigger the germination of the seed.his layer may be thick or thin, depending on the species, but it often contains light-sensitive chemicals. When conditions are right -- there is appropriate light and water -- the seed coat may trigger the germination of the seed.
Other, non-fleshy, fruits use other mechanisms for seed dispersal. In some plants, fruits can develop without fertilization. This is called parthenocarpy, and such fruits are seedless. As the ovary develops into a fruit, its wall often thickens and becomes differentiated into three, more or less distinct, layers.