Studying LifeChapter 1-3

Living things

• All living things have Eight characteristics they MUST have in order be called a living organism

Characteristics of living things

• Made up of units called cells

• Reproduce

• Are based on a universal genetic code

• Grow and develop

Characteristics of Living things

• Obtain and use materials and energy

• Respond to their environment

• Maintain a stable internal environment

• Change over time, as a group

Made up of cells

• All living things are made up of cells

• A cell is a collection of living matter enclosed by a barrier separates the cell from its surroundings.

Multicellular and Unicellular

• Living organisms do not have to be made up of more than one cell.

• A one celled organism is called a unicellular organism

• An organism made of many cells is called multicellular.

Reproduction• All living things can create new life through the process of reproduction

• There are two types of reproduction:

• Sexual Reproduction

• Asexual Reproduction

Sexual REproductionVs

Asexual Reproduction

• Sexual reproduction is a type of production that involves two cells from different parents combining to form a new organism

Sexual REproductionVs

Asexual Reproduction

• Asexual Reproduction occurs when an organism is created from a single parent

Based on a genetic code• It is very common for offspring to resemble their parents

• With asexual reproduction the parent and offspring have the exact same traits

Based on a genetic code

• With sexual reproduction offspring have traits from both parents.

• This creates differentiation from parent to offspring

Can you tell the difference?

• In this photo 3 of the people are brothers. Which of the 6 are the 3 brothers?

Growth and development

• Every living organism has a life cycle

• In this cycle, the organism will grow and develop from one cell to full adult.

Need for materials and energy

• All living creatures have a need of various materials which they will use to create energy to perform various life functions

• This process of building up or breaking down materials for energy creation is called metabolism

Response to the environment

• All organisms respond to their environment

• Responses happen because our environment is ever changing

• Responses can happen in many ways

Maintaining an internal Balance

• Living things need to maintain an internal balance

• This ability is called Homeostasis

• Maintaining homeostasis is also a response to our environment

Ability to change over time

• All living things must be able to change over time

• We refer to this fact as evolution

• Evolution occurs when characteristics are naturally selected in order to increase the chance of survival