Living Things, Cell Theory, and Cell Structure

Practice flashcards covering living characteristics, cell theory principles, historical contributions, and microscope investigation procedures.

What are the two debatable questions introduced in Lesson One?

"Should Scientists reclassify organisms?" and "Could humans create artificial life?"

What are the three principles of Cell Theory?

1. Cells are the building blocks / structure of all living things.
2. Cells are the smallest unit of life.
3. Cells come from pre-existing cells through cell division.

What contribution did Robert Hooke make to cell biology?

Known as the father of cells and a pioneer of cell biology, he developed a microscope to observe the structure of cork.

What were Antonie Van Leeuwenhoek's major contributions to biology?

He developed powerful simple microscopes that magnified specimens up to 240x, and was the first to observe blood cells, sperm cells, and single-celled organisms in pond water.

How did Louis Pasteur's experiment disprove the idea that life appeared spontaneously?

His experiment showed that sterilized broth remained free of bacteria and that bacteria entered only when exposed to contaminated air.

What characteristics of living things are listed in the notes?

1. Obtain nutrients
2. Respire
3. Grow
4. Respond to stimuli
5. Excrete waste
6. Maintain homeostasis
7. Reproduce
8. Move

What is the inquiry question for Lesson 2 (Cell Structure and Functions)?

How does a cell's structure help it perform its function?

What materials are needed for the "Looking at cells" investigation?

Microscope, Clean slides and Cover Slips, Sterile cotton swab, Dropper, Methylene blue stain, Water, Elodea leaf, Paper towel, and Detergent disposal beaker.

What safety precautions must be followed during the cell investigation?

Do not share or reuse cotton swabs; dispose of used swabs immediately; avoid skin and eye contact with methylene blue; carry the microscope with two hands; and follow school laboratory risk assessment.

What are the procedural steps to prepare and view a cheek cell slide in Part 1 of the investigation?

1. Gently rub a sterile cotton swab inside your cheek.
2. Smear the sample onto the centre of a clean slide.
3. Dispose of the swab immediately as instructed.
4. Add one drop of methylene blue.
5. Lower a cover slip carefully.
6. Remove excess liquid with paper towel.
7. Begin with lowest-power objective.
8. Focus the image before increasing magnification.