concept – n. an idea of what something is or how it works

inefficient – adj. not capable of producing the desired results without wasting time and energy

culture – v. the beliefs, customs, arts of a particular group of people

induce – v. to cause something to happen next

hormone – n. a natural substance that is produced in the human body and determines how the body grows and develops

arable – adj. suitable for farming

yield – v. to produce something, such as crops

scale – v. a range of levels from low to high

photosynthesis – n. the plant process of deriving nutrients from the sun

artificial – adj. not real, not alive