Chromosome may be in a circular shape called a plasmid No organized organelles except for ribosomes (for making protein) Smaller than eukaryotic cells Oldest known form of life Eukaryotic Cells Organized nucleus & Organized organelles (in membrane) Two Plant vs. Animals PLANT Cells 1) Only plant cells contain chloroplasts 2) LARGE central vacuole & contain a cell wall ANIMAL Only animal cells contain lysosomes & Animal cells have centrioles Organelles Structure & Function - You must know all the organelles and their function. Refer to page 279 & 281 in your text The Microscope (Section 7.2 & 508 510 in text) – TRANSMISSION TRANSMISSION SCANNING LIGHT ELECTRON ELECTRON MICROSCOPE MICROSCOPE MICROSCOPE (TEM) (SEM) 100 000 20 000 GREATEST 1 000 (to 1 million) MAGNIFICATION IMAGE PRODUCED light passing through electrons passing electrons reflected BY the material through the material from the material FOCUSING DONE BY ground glass lenses electromagnets electromagnets IMAGE PRODUCED retina in the monitor monitor ON eye/monitor colour, black & white, black & white, QUALITY OF IMAGE internal internal three-dimensional, PRODUCED structure, low structure, high surface detail, resolving power resolving power high resolving power very ADVANTAGES colour image, living great magnification, details material can be magnification, of internal structure viewed images can be easily understood low magnification, DISADVANTAGES material must be material must be image dead image dried (dead) difficult to interpret
Chromosome may be in a circular shape called a plasmid No organized organelles except for ribosomes (for making protein) Smaller than eukaryotic cells Oldest known form of life Eukaryotic Cells Organized nucleus & Organized organelles (in membrane) Two Plant vs. Animals PLANT Cells 1) Only plant cells contain chloroplasts 2) LARGE central vacuole & contain a cell wall ANIMAL Only animal cells contain lysosomes & Animal cells have centrioles Organelles Structure & Function - You must know all the organelles and their function. Refer to page 279 & 281 in your text The Microscope (Section 7.2 & 508 – 510 in text) TRANSMISSION LIGHT MICROSCOPE TRANSMISSION ELECTRON MICROSCOPE (TEM) SCANNING ELECTRON MICROSCOPE (SEM) GREATEST MAGNIFICATION 1 000 100 000 (to 1 million) 20 000 IMAGE PRODUCED BY light passing through the material electrons passing through the material electrons reflected from the material FOCUSING DONE BY ground glass lenses electromagnets electromagnets IMAGE PRODUCED ON retina in the eye/monitor monitor monitor QUALITY OF IMAGE PRODUCED colour, internal structure, low resolving power black & white, internal structure, high resolving power black & white, three-dimensional, surface detail, high resolving power ADVANTAGES colour image, living material can be viewed very magnification, details of internal structure great magnification, images can be easily understood DISADVANTAGES low magnification, image material must be dead image difficult to interpret material must be dried (dead)
sci_10_final_review_1_key.docx