Ch. 1: Characteristics of Life Questions of the Day Ch. 1: Characteristics of Life Questions of the Day... Answer in complete sentences What do organisms need in order to survive? What is the smallest form of life that you can think of? What are characteristics of living things? What is Biology and how is it beneficial? What might a Biologist study?

Ch. 1: Characteristics of Life Objectives Identify the characteristics that living organisms exhibit. Explain the different fields biologists enter.

Ch. 1 Characteristics of Life Biology is the study of Life Biologists study living things, their behaviors, how their systems work, and anything related to living or once living things. What are some things that biologists would study?

Ch. 1: Characteristics of Life

Ch. 1: Characteristics of Life Basic Necessities Food for Energy Water Oxygen

Ch. 1 Characteristics of Life All organisms are made up of at least 1 cell. Unicellular – 1 cell Multicellular – Many cells

Ch. 1 Characteristics of Life QUESTION! What do you think makes an organism complicated? Can anything living truly be considered simple?

Ch. 1 Characteristics of Life All organisms display organization. Cells Tissues Organs Organ Systems Organism Organization goes from basic to increasingly complex...

Ch.1 Characteristics of Life All organisms grow and develop. Grow - Add mass to get larger. Develop – Process of change/maturing Tadpole => Frog People do not stay infants. We undergo change and develop over time.

Ch. 1 Characteristics of Life All organisms reproduce Asexual – 1 parent divides to become 2 genetically identical offspring (bacteria) Sexual – 2 parents combine genetic information to produce genetically different offspring (mammals)

Ch. 1 Characteristics of Life QUESTION! You see a bear lying down in a forest. There is a stick nearby... How can you determine if it is alive?

Ch. 1 Characteristics of Life All organisms respond to stimuli Stimuli – environmental cues that cause a response Response – reaction to the stimuli Living things will respond to a stimulus. Poke the bear...

Ch. 1 Characteristics of Life All organisms require energy in order to survive. Carry out processes of life. Energy molecule used is ATP (adenosine triphosphate) Produces – organisms that make sugar (plants) Consumers – organisms that eat the sugar (animals)

Ch. 1 Characteristics of Life QUESTION! King crab fishing in Alaska is considered the deadliest job. Why? What happens if a crew member falls into the freezing (sub zero) Bering Sea?

Ch. 1 Characteristics of Life All organisms maintain homeostasis Homeostasis – a controlled internal environment Human temperature - 98.6 F or 37 C Blood sugar 80-120 mg/dl Optimum range for operation Turtles? Cold blooded. What do they need? If an organism's internal environment changes and disrupts homeostasis, chemical reactions stop and death can occur.

Ch. 1 Characteristics of Life QUESTION! If the Zombie Apocalypse happens, will society and the world as we know it change? What will people have to do in order to survive?

Ch. 1 Characteristics of Life All organisms adapt and evolve. Evolve – changes over a period of time. Adapt – to become more fit to live in an environment Evolution occurs when new adaptations show up in a population. These adaptations arise when changes in DNA occur. Humans will have to adapt to the new zombie world and evolve to become immune in order the species to survive the zombie apocalypse.

Ch. 1: Characteristics of Life

Ch. 1: Characteristics of Life Biologists study all things related to living and once living things.

Ch. 1: Characteristics of Life List all of the characteristics of life and briefly describe each characteristic. Discuss how one can tell the difference between a living and non living thing. Work on Ch. 1 Vocabulary