Biological Levels

1: Levels of Organization in Biology

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LEVELS OF ORGANIZATION OF LIVING THINGS

• Levels of organization are structures in nature, usually defined by part-whole relationships, with things at higher levels being composed of things at the next lower level.

• The atom is the smallest and most fundamental unit of matter. It consists of a nucleus surrounded by electrons.

• At the highest level of organization the biosphere is the collection of all ecosystems, and it represents the zones of life on Earth. It includes land, water, and portions of the atmosphere.

• See example on the next slide.

What next?

• Watch the video on the next slide to review the concepts.

• Followed by completing six questions.

• We believe in you and your abilities.

Multiple Choice

Cells are.....

• a group of tissues that together carry out a specific function

• structural and functional units of all living things.

• groups of organs that together carry out a specific function

• are only found in animals.

Multiple Choice

A system or group of interconnected elements formed by the

interaction of a community (biotic) with their environment

(abiotic)

• Organism

• Population

• Community

• Ecosystem

Multiple Choice

Which of the following is the correct order of organization in living things from the most basic (simple) to the most complex?

• Organism, cell, tissue,organ, organ system

• Organ system, organ, cell, organism, tissue

• cell, organ, tissue, organ system, organism

• cell, tissue, organ, organ system, organism

Multiple Choice

What is a multicellular organism?

• an organism with one cell

• an organism with 2 or more cells

• bacteria

Multiple Choice

Another word for "any living thing" is . . .

• organelle

• organic molecule

• organism

• organ system

Multiple Choice

Cells become specialized for different functions through . . .

• classification

• cell differentiation

• cell division

• homeostasis

CONGRATS! YOU HAVE FINISHED.

Questions please ask.