What is Biology?

Bio = lifeLogy = study of

What do Biologists do?

• Study the Diversity of Life• Research Diseases• Develop Technologies• Improve Agriculture• Preserve the Environment

Cells

Basic unit of life and structure of all living things

Organisms can either be multicellular or

unicellular

Cells – Unicellular

• Called PROKARYOTES-all are single celled

• Unicellular – the organisms entire body consists of just a single cell

• DNA is not contained in a nucleus- everything is in the cell together

Cells - Multicellular

• Called EUKARYOTES- most are multicellular

• Multicellular – organism is made up of many cells. (humans)

• Differentiation:Cells have certain functions in the organism

• Has a nucleus

Tissues

• Many cells of the same kind working together to perform a certain function

Ex: muscle cells – all work together to make muscle tissue

Organs

• Two or more tissues working together to perform a specific function.

• Nerve tissues and smooth muscle tissues work together to form your heart.

Organ Systems

• Two or more organs working together to perform a specific function.

• Ex. – digestive, respiratory, reproductive systems

Organisms (multicellular)• One individual is considered an Organism

• Ex – humans, dogs, frogs

Populations

• Group of individual organisms of the same species living in a particular area.

• Ex: A pride of lions

Community

• Interacting of two or more populations that inhabit a particular area.

• Ex: zebras and wildebeests at the watering hole

Ecosystem

• Where many different communities interact and live with each other.

• Example: Desert, Forest, Mountains

• Two factors associated with ecosystems;– Abiotic – nonliving– Biotic - living

Biosphere

• Consist of all parts of the planet.

Complete Flow Chart of Biology!

• On a piece of paper…• Create a flow chart using the vocab we

learned today • Start with CELL and end with

BIOSPHERE• Draw a picture under each term that

represents that level. You need two examples for each level except Biosphere.

• Make it colorful and aesthetically pleasing.