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Characteristics of Life--updated.ppt

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Benjamin Madrigal
Benjamin Madrigal

This document outlines the 8 key characteristics that define life: 1. Living things are made of cells, either unicellular or multicellular. 2. Living things reproduce, either sexually requiring two parents or asexually with one parent. 3. Living things are based on a universal genetic code stored in DNA that is inherited from parents. 4. Living things grow and develop over their lifetime.

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Characteristics of Life
Biology = the study of life What does it mean to be alive??? • There are 8 characteristics of life . . . –No single characteristic is enough to describe a living thing . . . –They must have all eight.
8 Characteristics of Life 1. Living things are made up cells. 2. Living things reproduce. 3. Living things are based on a universal genetic code (DNA). 4. Living things grow and develop.
8 Characteristics of Life (cont.) 5. Living things obtain and use materials and energy. 6. Living things respond to their environment. 7. Living things maintain a stable internal environment. (homeostasis) 8. Taken as a group, living things change over time.
1—Made up of cells They can be either unicellular or multicellular. Picture of a Cell ***Unicellular = made up of ONE cell Picture of a unicellular organism. ***Multi-cellular = made up of MORE than one cell Picture of multicellular organisms
2—Reproduction ***asexual = reproduction that requires ONE parent ***sexual = reproduction that requires TWO parents There are 2 types of reproduction: 1. Asexual 2. Sexual
3—Based on a genetic code ***DNA = DNA is the genetic code found in every cell. DNA is inherited from parents and controls your traits.
4—Grow and Develop ***Think about it . . . Do you look the same as when you were born???? **All living things grow and develop during at least part of their life.
5—Need for materials and energy **Living things need a constant supply of materials and energy. **Metabolism = the process of using those materials.
6—Response to the environment **Internal stimuli = signal comes from inside the organism **Organisms detect and respond to STIMULI (or signals) from their environment. **External stimuli = signal comes from outside the organism
7—Maintaining internal balance Despite changing conditions around them, organism must keep their internal conditions stable/balanced. **Homeostasis = the process of keeping the internal environment stable/balance/constant
8—Change over time Over hundreds, thousands, and millions of years, organisms have the potential to change = evolution

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Characteristics of Life--updated.ppt

  • 2. Biology = the study of life What does it mean to be alive??? • There are 8 characteristics of life . . . –No single characteristic is enough to describe a living thing . . . –They must have all eight.
  • 3. 8 Characteristics of Life 1. Living things are made up cells. 2. Living things reproduce. 3. Living things are based on a universal genetic code (DNA). 4. Living things grow and develop.
  • 4. 8 Characteristics of Life (cont.) 5. Living things obtain and use materials and energy. 6. Living things respond to their environment. 7. Living things maintain a stable internal environment. (homeostasis) 8. Taken as a group, living things change over time.
  • 5. 1—Made up of cells They can be either unicellular or multicellular. Picture of a Cell ***Unicellular = made up of ONE cell Picture of a unicellular organism. ***Multi-cellular = made up of MORE than one cell Picture of multicellular organisms
  • 6. 2—Reproduction ***asexual = reproduction that requires ONE parent ***sexual = reproduction that requires TWO parents There are 2 types of reproduction: 1. Asexual 2. Sexual
  • 7. 3—Based on a genetic code ***DNA = DNA is the genetic code found in every cell. DNA is inherited from parents and controls your traits.
  • 8. 4—Grow and Develop ***Think about it . . . Do you look the same as when you were born???? **All living things grow and develop during at least part of their life.
  • 9. 5—Need for materials and energy **Living things need a constant supply of materials and energy. **Metabolism = the process of using those materials.
  • 10. 6—Response to the environment **Internal stimuli = signal comes from inside the organism **Organisms detect and respond to STIMULI (or signals) from their environment. **External stimuli = signal comes from outside the organism
  • 11. 7—Maintaining internal balance Despite changing conditions around them, organism must keep their internal conditions stable/balanced. **Homeostasis = the process of keeping the internal environment stable/balance/constant
  • 12. 8—Change over time Over hundreds, thousands, and millions of years, organisms have the potential to change = evolution