1. What happens to potato cells when they are placed in salt or sugar solution for about an hour?
2. What is the main function of ribosomes in a cell?
3. Which plastid type is colourless and mainly stores starch, oils, or proteins?
Cell discovery — who?
Robert Hooke observed cells in 1665.
Microscope types — two?
Light and electron microscopes.
Cell membrane — role?
Protects cell and controls substance passage.
Osmosis — mechanism?
Water diffuses across a membrane from dilute to concentrated.
Nucleus — function?
Houses DNA and controls cell activities.
Chromatin vs chromosomes — difference?
Chromatin is uncondensed DNA; chromosomes are condensed during division.
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