Presentation is loading. Please wait.

Presentation is loading. Please wait.

Notes E 1.3 Different cells perform various functions.

Similar presentations


Presentation on theme: "Notes E 1.3 Different cells perform various functions."— Presentation transcript:

1 Notes E 1.3 Different cells perform various functions.

2 Organisms can be classified by their cell types. Most organisms are unicellular 3 domains of organisms: – Archaea: prokaryotes, live in extreme environments – Bacteria: prokaryotes, share some similarities with Archaea, but live in most environments – Eukarya: Eukaryotes, include multicellular organisms (plants, animals, fungi, and some protists)

3 Domains Domains, kingdoms, and other classifications remain in flux and debated within the scientific community. Some scientists recognize 5 kindoms instead of 6. Some refer to domains rather than ingdoms.

4 Cells in multicellular organisms specialize. All mc organisms begin as a single fertilized egg cell. As cells divide, they specialize to perform specific jobs. The more specialization there is, the more complex the organism is.

5 A multicellular organism is a community of cells. Organisms have different levels of organization : – Similar cells group together to form tissues. – Tissues act together to form organs. – Organs and tissues act together to form organ systems.

6 Scientists use models to study cells. Scientists use models to make complicated structures or processes easier to understand. Some examples of models: – Mathematical or chemical equations – Diagrams – Process models – Physical models


Download ppt "Notes E 1.3 Different cells perform various functions."

Similar presentations


Ads by Google