Living Things

Candle Demo

Organism: Any living Thing

Living Things Living things are made of cells & carry out life processes Ingestion digestion removal of waste Response to stimuli growth and repair gas exchange reproduction

1.Living things are made of cells A cell is the basic building block that makes up all living things Cells are alive & found in ALL organisms Cells contain all materials necessary for life & can perform al life functions! Think of Legos!

What Do Cells Do? Cells perform numerous functions cellular respiration/use energy waste breakdown and removal growth and division and cellular transport

All living things are made of 1 or more cells Plant Cells Human Skin Cells

Unicellular Organisms Organisms made of only ONE cell Example: Bacteria/Protista Less advanced Unicycle They still meet all the characteristics of living things

Multicellular Organisms Multi = many Organisms made of many cells Examples: Plants, Animals, & Fungi

Multicellular vs. Unicellular Multicellular Lion Unicellular Paramecium Made of more than one cell Made of only one cell Multicellular vs. Unicellular

Unicellular organisms perform all activities inside one cell!

Asexual Reproduction

Sexual Reproduction

Multicellular Organisms have specialized cells that are organized

Levels of Organization in Cells Cells in multicellular organisms must be organized to perform specialized functions. *Division of Labor Cells Tissues Organs Organ System

Levels of Organization Tissue- group of cells performing same function Organ- group of tissues performing same function Organ System- group of organs performing same function

Paramecium Video

Cellular Organization Video 6:20-11:50min

Review The simplest level of organization is: The cell Tissues Organs Organ systems

Homeostasis Cells & living things must keep stable conditions to survive Homeostasis: the process of maintaining stable conditions. Ex: Maintaining body temperature

Review Which is NOT an example of homeostasis? A. Keeping a constant body temperature B. Maintaining steady blood sugar C. Sweating to keep cool D. These are ALL examples

Ingestion & Digestion Some organism ingest or eat food, while others make their own through photosynthesis Organisms must digest (break down) food in order to obtain energy

Waste Removal Organisms must be able to get rid of unnecessary or harmful wastes = excretion

Response & Stimulus Stimulus: a change in the environment Response: a movement, action, or change in behavior because of a stimulus Example: Blinking Lights on/off: Clapping

Growth & Repair Growth = get bigger Development = change as you grow Organisms grow by producing more cells Development = change as you grow Organisms must be able to repair damaged cells!

Gas Exchange Organisms exchange gases with the environment through: Photosynthesis & Cellular Respiration Both processes are important for obtaining energy for cells

Reproduction Sexual Reproduction: requires two parents Offspring will be different Example: Humans & Animals Asexual Reproduction: requires one parent Offspring will be clones Examples: Bacteria

Review A flower bends toward the sunlight…what is the stimulus? The flower bending The sunlight The wind The temperature

Needs of Living Things

How do organisms STAY Alive? They need: Shelter Water Food Gases (O2 & CO2) Living Space Each organisms has a range of conditions it must meet to stay alive!

Shelter A place to be safe from predators & the elements (weather)

Water Must have water for all chemical activities Water makes up most of our cells

Food Provides an energy source All living things need energy Autotrophs: Make their own Heterotrophs: Must find food

Living Space Need space to find food, water, mates If there is not enough space = competition between organisms

Review Which is NOT a need of living things? Food Water Reproduction Shelter