Chapter 1 Review

Chapter 1 Review

Characteristics of Living Things

• Have an orderly structure

• Produce Offspring

• Grow and Develop

• Adjust to Changes in the Environment

Have an Orderly Structure

• All living things have cellular organization

• Whether an organism is made up of one cell or billions of cells, all of its parts function together in an orderly living system

• Ex. Humans: human cells make up tissues, tissues make up organs
  
  

Produce Offspring

• Living things make more living things

• Organisms don't live forever

• For life to continue, they must replace themselves

Grow and Develop 

• Growth: results in an increase in the amount of living material and the formation of new structures 

• Ex.  embryos: they grow larger and organ systems are formed such as heart, eyes, and lungs

• Development: all the changes that take place during the life of an organism

Adjust to Changes in the Environment

• Environment: surroundings; includes air, water, weather, temperature, any other organism in the area, and many other factors

• Stimulus: anything in an organisms internal or external environment that causes the organism to react

• Response: reaction to a stimulus

• Ex. Stimulus: it gets warmer outside throughout the day, Response: dog pants to cool off
  

Adjust to Changes in the Environment

• Homeostasis: regulation of an organism's internal environment to maintain conditions suitable for its survival

• Energy: ability to cause change

• A transfer of energy is necessary to maintain homestasis

Poll

Do you understand the characteristics of life?

• Yes

• No

• Some of them

Poll

Which characteristic(s) of life do you find most confusing?

• Have an orderly structure

• Produce offspring

• Grow and develop

• Adjust to changes in the environment

• I understand all of them

Methods of Biology

Scientific Methods

• Observe

• Make a hypothesis

• Collect data

• Publish results

• Form a theory

• Develop new hypotheses

• Revise theory

Variables

• Independent variable: The condition in an experiment that is tested. The only factor that affects the outcome of the experiment

• Dependent variable: Results from the change. Any changes in the dependent variable depends on changes made to the independent variable
  

The Nature of Biology

• Quantitative information: can be quantified or made into numbers; numerical 

• Qualitative information: purely observational data; written descriptions of what is observed

Science and Society

• Science can't answer all questions; some questions are not in the realm of science

• Technology can't solve all problems; technology has many issues