1. iScience 7-Chapter 1 Lesson 1- Characteristics of Life
Vocabulary

2. life science
the study of all living things

3. biology
the study of all living things

4. bio
life

5. organism
things that have all the characteristics of life

6. cell
the smallest unit of life

7. unicellular paramecium
living things that are made of only one cell
amoeba
Life in a Drop of Water

8. multicellular
living things that are made of two or more cells

9. growth
process of becoming larger by adding cells and/or by increasing cell size

10. development
changes that occur in an organism during its lifetime

11. metamorphosis
a complete or marked change of physical form, structure, or substance

12. metamorphosis
a complete or marked change of physical form, structure, or substance

13. reproduction
the process by which one organism makes one or more new organisms

14. asexual reproduction
a type of reproduction in which one parent organism produces offspring without meiosis and fertilization

15. sexual reproduction
type of reproduction in which the genetic material from two different cells—a sperm and an egg—combine producing an offspring

16. stimulus
a change in an organism’s environment that cause a response

17. response
adjustment to changes in internal and external environments

18. homeostasis
an organism’s ability to maintain steady internal conditions when outside conditions change