cell The basic unit of structure and function in all organisms. All organisms are made of at least one cell. A leaf and a butterfly are both made of cells.

homeostasis The maintenance of stable internal conditions despite changes in the surroundings. He was freezing and he couldn’t regain homeostasis.

sexual reproduction *The joining of a sperm cell and an egg cell. When two parents produce offspring that share the characteristics of both parents. *The joining of a sperm cell and an egg cell. 4 words: *joining *sperm *cell *egg

stimulus response Something that causes a reaction The reaction to a stimulus

metabolism A sum of all the activities that an organism performs. These things require energy

asexual reproduction When a single parent produces offspring that are identical to the parent. Most single celled organisms and many multi-celled organisms reproduce in this way. See page 54

Summary p55 See ch7, s1pp Organisms are made of at least one cell. Organisms detect and respond to stimuli. Organisms reproduce through sexual or asexual reproduction. Organisms have DNA. Organisms use energy to carry out their activities. Organisms grow and develop. See ch7, s1pp