Warmup. A complete sentence expresses a thought. Can a thought be expressed by less than a complete sentence? Can that thought be divided … And divided again? What is the smallest piece of that original thought that has any meaning at all?
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A complete sentence expresses a thought.
Can a thought be expressed by less than a complete sentence?
Can that thought be divided …
And divided again?
What is the smallest piece of that original thought that has any meaning at all?
How would you describe the size of the smallest piece, and what relationship does it have with the original thing?
October 3, 2011
History of Discovery
Hierarchies of Organization
Differentiation and Specialization
Students understand cell theory, metabolisms, and categories of organic compounds.
Students know the functions organelles carry out (nucleus, ribosome, mitochondria, chloroplast, mitochondria)
Students can differentiate between plant eukaryote, animal eukaryote, and prokaryotic cells, and between stem and specialized cells, and between haploid and diploid cells, and understand the difference between types of cell division, sexual reproduction, and asexual reproduction.
Cells are so small (measurable in micrometers, or 1/1,000,000th of a meter) they were not discovered until after the invention of the microscope.
1663 – Robert Hooke observes cork, calls empty boxes “cells”.
1674 – Anton van Leeuwenhoek observes living microorganisms.
Cells are self-contained by a wall or a membrane, which allows some materials to move in and out.
Some cells are multi-purpose, while others perform only one special job.
Cells divide in half to create two daughter cells.
A scientist puts nutritious broth in a jar, and weeks later observes it under a microscope. She sees many cells. According to cell theory: