* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Cellular Components - holyoke
Survey
Document related concepts
Signal transduction wikipedia , lookup
Cytoplasmic streaming wikipedia , lookup
Cell membrane wikipedia , lookup
Tissue engineering wikipedia , lookup
Extracellular matrix wikipedia , lookup
Cell nucleus wikipedia , lookup
Cell encapsulation wikipedia , lookup
Endomembrane system wikipedia , lookup
Cellular differentiation wikipedia , lookup
Programmed cell death wikipedia , lookup
Cell culture wikipedia , lookup
Cell growth wikipedia , lookup
Cytokinesis wikipedia , lookup
Transcript
Chapter 7 - Pretest Cellular Components Cell Theory Overview of Cell Structure Cytoplasmic Organelles First….check this out… http://www.youtube.com/watch?v=6E1zh6ukcOU CELL THEORY A theory resulting from many scientists’ observations & conclusions CELL THEORY 1. The basic unit of life is the cell. (Hooke) In 1665, an English scientist named Robert Hooke made an improved microscope and viewed thin slices of cork viewing plant cell walls Hooke named what he saw "cells" CELL THEORY 2. All living things are made of 1 or more cells. Matthias Schleiden (botanist studying plants) Theodore Schwann (zoologist studying animals) stated that all living things were made of cells Schwann Schleiden CELL THEORY 3. All cells divide & come from old cells. (Virchow) Virchow Overview of Cell Structure Cells vary in size, shape and function Control center of the cell – Nucleus Cell contains fluid filled cytoplasm Cell is surrounded by a membrane Eukaryotes vs. Prokaryotes All life on Earth can be divided into 2 categories, depending on whether they contain a nucleus. Eukaryotes (do) and Prokaryotes (do not) EUKARYOTES The cells of a eukaryote are complex and contain a nucleus and other membrane bound structures. Examples include: animals, plants, protists, and fungi. Eukaryotes are multicellular with the EXCEPTION of protists and yeasts (single-celled fungi) EUKARYOTE PROKARYOTES They carry out every activity associated with living things (growth, reproducting, respond to stimuli…see characteristics page 16&17) Are bacteria Have a much simpler structure with no internal membranes, and lack well defined nucleii These simple prokaryotes colonized the Earth 2 billion years before Eukaryotes ever showed up!! PROKARYOTE Prokaryote vs. Eukaryote Prokaryote or Eukaryote?? Prokaryote or Eukaryote?? Prokaryote or Eukaryote?? Chapter 7 of Student Text Assignment: Q 1-5 on Page 173