You have a complex sentence. Best is the last word of a complete sentence. When is an adverb. It is followed by the word They. The word They starts a complete sentence. Thus, the word when makes the second sentence subordinate to the first sentence. That makes it complex.
sunflower wheat apple corn rice oats
Complex plants are plants that have cells that are found in both plants and animals. These complex plants have an array cells that act together to support the plant.
N. S. Petinov has written: 'The physiology of irrigated agricultural plants' -- subject(s): Plants, Water requirements
(adjective) The study of cell growth is a complex procedure. The complex ecosystem of the forest includes many types of plants and animals. (noun) The new industrial complex is located near the river. His mother feared he would develop a complex, and took him to a psychologist.
Humans are heterotrophs, because they cannot make food themselves like plants.
Cells are so specialized to carry out all the complex functions in animals and plants.
moat irrigation system is a manual type of irrigation in which the water is drawn from a well and the plants r irrigated
A. I. Dow has written: 'Salt tolerance studies on irrigated mint' -- subject(s): Plants, Effect of salt on, Peppermint
seeds
Cellulose.
The act or process of irrigating, or the state of being irrigated; especially, the operation of causing water to flow over lands, for nourishing plants.
Cellulose.