600 likes | 2.49k Views
POST LAB: Plant & Animal CELLS or. “Two Cells One World”. CORK cells. 100X. Cork = bark of the cork oak tree ( Quercus Suber ) Cell Wall Cork Cells are NOT ALIVE. Cell Wall. NO cytoplasm NO organelles. CORK 450X. Human Cheek Cell. Cheek cell Squamous cell epithelium Eukaryotic
E N D
POST LAB: Plant & Animal CELLSor “Two Cells One World”
CORK cells 100X • Cork = bark of the cork oak tree (Quercus Suber) • Cell Wall • Cork Cells are NOT ALIVE Cell Wall NO cytoplasm NO organelles CORK 450X
Human Cheek Cell • Cheek cell • Squamous cell epithelium • Eukaryotic • Obvious nuclei • Cell Membrane • Cytoplasm
LABELS: • Cheek Cell 100x Cheek Cell 450x Cell membrane Nucleus Cytoplasm
Elodea Wet Mount • cell walls • green chloroplasts • Most slides show multiple cell layers • Shows depth by focusing to see 3-D cells
Elodea Wet Mount • Regular repeating structure/arrangement of plant cell walls
Elodea slides: Wet Mount Scanner 40x Low power 100x High 450x
Potato Wet Mount • Leucoplasts • Notice Starch granules • Cell wall • What could be done to prove that starch is present in the leucoplast?
Potato Wet Mount • ADD a Stain (Iodine) • How do you know it is a STARCH? • TEST for Starch: blueblack
Potato slides: Potato (leucoplasts) 40x (no stain) Potato (leucoplasts) 40x stain Potato (leucoplasts)450x Potato (leucoplasts)100x
LABELS: Couch potato Cell wall Cell membrane (inside of cell wall) Starch grains Leucoplast (whole cell) that is surrounded by cell wall Potato (leucoplasts) 450X
STAIN: Why Add stain?? Nucleus UNSTAINED ONION 100X STAINED ONION 100X Nucleus UNSTAINED CHEEK 100X STAINED CHEEK 450X
Here we go>>>> Wandering JewTradescantia zebrina Celery Cell Walls Banana cells Starch granules in BEAN embryo
Onion Cell 100x • Cell wall • Nucleus • Plant cells have a cell membrane inside next to cell wall (cellulose)
Chromoplasts: Color =Vitamins/attraction Red Bell pepper Green Bell pepper Chromoplasts Nucleus Marigolds
Onion Cell 400x (notice nuclei) 450X 450X
The PEAR: What is the grit in a pear? Cell wall 450x Stone cells (sclerids) High power 450X 450x stained
In Honor of the Louisiana Heritage: Tabasco Sauce • Avery Island, Louisiana, USA. Chromoplasts Cell Wall Tabasco peppers
Plant Cells: From Chloroplasts (green) to Chromoplasts (ripe)
Comparing Plant/Animal Cells • Plant cells are like animal cells, except for 3 differences: • Large Vacuole • Cell Wall • Plastids: Chloroplast Chromoplast Leucoplast chloroplast
Comparing Animal & Plant cells • Cell membrane • Centrioles (cell division) • Small Vacuoles Cell membranes allow animals to be FLEXIBLE / MOBILE Cell walls give plants STRENGTH / SUPPORT.
Animal Cells: Human Blood • Notice human red blood cells have no nucleus • White cells are purple stained. Notice the difference in the shape of white cell nuclei
Animal Cells: Frog’s Blood • Both red cells (erythrocytes) & white cells (leukocytes) • Frog red cells have a nucleus • White cells are dark purple staining
Bacteria Slide 400x (gram stain) • extremely small • prokaryotes • lack membrane bound organelles & nucleus • multiply rapidly
Henry Dutrohet 1824“---all living things are composed of cells.”