Ms. Politano - HS ZoologyMs. Politano - HS Zoology

Unit 1- Classifying and Exploring LifeUnit 2- Cell Structure and FunctionUnit 3- From a Cell to an OrganismUnit 4- Reproduction of LifeUnit 5- GeneticsUnit 6- InvertebratesUnit 7- VertebratesUnit 8- Zoological CareersUnit 9- Cryptozoology

Before we begin, decide if you agree or disagree with these statements.

1. All living things move2. The sun provides energy for almost all living

things on Earth3. A dichotomous key can be used to identify an

unknown organism4. Physical similarities are the only traits used to

classify organisms 5. Most cells are too small to be seen with an

unaided eye6. A zoologist only studies animals living in a zoo

Characteristics of Life Characteristics of Life All living things:

Are organized (cells, organs, etc)

Grow and developReproduceRespond to stimuliMaintain homeostasis Use Energy

OrganizationOrganizationA cell is the smallest unit of life.

Living things that are made of only one cell are known as unicellular organisms.

Multicellular Organisms are made of many cells that have specialized functions.

Growth and DevelopmentGrowth and DevelopmentAll living things will grow and develop from birth. Some go through extreme physical changes ( example a frog or butterfly) This is known as metamorphosis.

Unicellular organisms have their one cell increase in size. Multicellular organisms grow in their total number of cells.

ReproductionReproductionAll living things have the ability to reproduce

and create offspring.

Extinction often occurs when organism are being killed off faster then they can reproduce.

Asexual reproduction produces offspring that is genetically identical to its one parent.

Sexual reproduction produces offspring that have 50% genetic information from each parent

Response to Stimuli Response to Stimuli Internal Stimuli An organisms reaction to changes

happening inside its body. Example: hunger and thirst occur

internally.

External Stimuli Changes in an organisms

environment that affect an organism.

Example: a reptiles response to temperature change. The outside temperature of the environment cause the reptile to have more or less blood flow to their skin

HomeostasisHomeostasisAn organism's ability to maintain

internal conditions when outside conditions change is called homeostasis.

Homeostasis is important because it ensures cells continue to function. If cells do not function properly an organism can become ill or even die.

EnergyEnergy

The only living things that can produce their own food are plants. All animals must consume food in order to survive.

Almost all the energy provided to living things begins with the sun.

The energy relationship between living things is known as a food chain. Multiple food chains make up an ecosystem’s food web.