Microscopes and Onions
What happens to onion cells in salt water?
They shrink
The diffusion of water is called
osmosis
What is diffusion?
The movement of molecules across a membrane
What cell organelle controls the cell and holds DNA?
Nucleus
Why are viruses not technically considered alive?
No cells/Can't reproduce on their own/Can't make their own energy
A microscope has an eyepiece magnification of 10x and an objective magnification of 5x. What is the total magnification?
50x
If a cell has more water inside than outside then water will move
out of the cell
What is it called when there is the same number of molecules on both sides of the membrane?
equilibrium
Where is ATP made in animal cells?
Mitochondria
Is a squirrel biotic or abiotic?
Biotic
Why was starch not able to pass through the membrane?
It was too big
A HYPERTONIC solution will make water move
out of the cell
What direction does ACTIVE transport move?
Low to High
What do ribosomes make?
Proteins
What does homeostasis mean?
Balance
If a microscope has an eyepiece magnification of 20x and an objective magnification of 40x, what is the total magnification?
800x
What does it mean if a solution is ISOtonic?
It has the same amount of water on both sides of the membrane
What does ACTIVE transport need that no other type of diffusion needs?
ATP/energy
Where does photosynthesis happen?
Chloroplast
The independent variable is the variable that you ....
Chage
How do you measure a specimen using a graphing slide?
Put the specimen on top of the graphing slide and count the squares
Draw a cell with the movement of water if it is in a HYPOtonic solution
-->O<--
What is facilitated diffusion? (2 parts)
It uses proteins to move molecules from high to low
What do plant cells have around them?
Cell Wall
Name 3 characteristics of life
1. Cells
2. Growth/Development
3. Reproduction
4. Respond to Environment
5. Metabolism/Nutrition
6. Homeostasis
7. Adaptation/Evolution