Lab disasters
You skip adding glycerin to a plant slide . What happens to the cells ?
They dry up and lose their clear shape
Why can a plant cell survive high pressure that would pop an animal cell ?
It has a rigid cell wall
Robert hooke saw "empty boxes" in cork , Why were they empty?
The cork was dead tissue, so the inner parts dried up
Why is methylene blue preferred for cheek cells over plant cells?
Animal cells lack walls and need blue stain for contrast
Where inside the human body do helpful bacteria live to aid digestion?
The gut
You stain cheek cells with safranin . What color do they turn ?
Pink/red
Which human cell is branched like a tree to send messages quickly ?
A nerve cell (neuron)
What box-like plant structure did hooke actually see if the inside was dead ?
The cell wall
Why won't viruses grow on a highly salted pickle?
High salt stops growth , and viruses need a living host .
Name an extreme, boiling- hot environment where microbes are found
Hot water springs
You drop a coverslip flat instead of at 45⁰ . What gets trapped inside ?
Air bubbles
Why are muscle cells in the stomach spindle - shaped instead of branched ?
To contract and relax smoothly to churn food
Leeuwenhoek saw "animalcules" in water . What do we call them today ?
Bacteria
Why is an Amoeba classified as unicellular if it can move and eat ?
Its entire body is made up of only one cell
What cheap , paper tool can you use in field to see microbes?
A foldscope
A student mistakes a trapped air bubble for a cell part . What part does it look like ?
A vacuole
An ostrich egg is one giant cell, but what non-cellular part protects it ?
The hard outer shell
Why didn't early lens-makers in the 1660s discover viruses ?
Viruses are too small for simple light microscopes
If a tissue is a team , what is an organ ?
A collection of different tissues working together
You find a rod-shaped single cell in a hot spring. Is it a plant?
No , it is a bacterium
You forgot to use any stain on a clear amoeba . What is the visual result ?
The cell is invisible or has no contrast
What liquid inside an egg is non- cellular but feeds the developing cell?
The albumen (egg white )
Why did early scientists call a lens a 'lentil' ?
It was thick in the middle and thin at the edges , like a lentil seed
Why is a virus called 'acellular '
It does not possess a standard cell structure
Salt and sugar preserve food by changing what conditions for microbes
The concentration