Term
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Definition
| Movement of water through a selectively permeable membrane from a high concentration of water to an area of lower concentrations of water |
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Term
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Definition
Movement of materials (not water) from an area of high concentration to an area of lower concentration
* Gases |
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Term
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Definition
| A solution of higher concentration of solutes and lower concentration of water molecules than another solution |
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Term
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Definition
| A solution of lower concentration of solutes and a higher concentration of water molecules than another solution |
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Term
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Definition
| A solution that contains equal concentration of solutes and of water molecules as another solution |
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Term
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Definition
| Allows certain materials to pass through in and out |
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Term
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Definition
Is the pressure the water inside the cell exerts on the cell wall or cell membrane
1. More water inside the cell more turgor pressure
2. Less water inside the cell less turgor pressure |
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Term
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Definition
Is the bursting of a cell because the turgor(osmotic) pressure is too high. This results because water is moving into the cell
10% salt 60% salt
90% water 40% water
Hypo Hyper
Water moves inside cell! (BURST) |
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Term
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Definition
is the wiliting of the cell because the turgor (osmotic) pressure decreases. This results because water is moving out of the cell
40% salt 30% salt
60% water 70% water
Hyper Hypo
Water moves out! Cell Shrinks!! |
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Term
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Definition
The one the experimenter controls to see what effect is has on the dependent variable |
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Term
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Definition
The one you want to study
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Term
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Definition
| receives independent variable |
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Term
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Definition
| doesn't receive independent variable |
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Term
| A researcher wants to test the affects of acid rain on tadpole mortality. He/she uses two groups of 50 tadpoles. One group is placed in ordinary water. The other group is placed in a solution of water and acid. Mortality is recorded over three days. Answer the following questions... |
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Definition
Control Group: group placed in ordinary water
Experimental Group: group placed in water and acid
Independent Variable: solution of water and acid
Dependent variable: morality |
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Term
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Definition
organisms that make their own food using energy and simple raw materials form the environment
Ex.) Plants
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Term
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Definition
Organisms that get energy and carbon by feeding on tissues, wastes, or remains of other organisms
Ex.) Animals |
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Term
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Definition
| Play a very important role in this world because they take care of breaking down (cleaning) many dead material. These simpler nutrients are returned to the soil and can be used again by the plants. The energy transformation chain starts all over again. |
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Term
| Life levels of organization |
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Definition
1. Atom
- building blocks of all matter
2. Molecule
- An association of 2 or more atoms
3. Cell
- smallest unit of life
4. Organism
- An individual consists of one or more cells
5. Population
- Group of individual species in a given area
6. Community
-All population of all species in a given area
7. Ecosystem
- A community interacting with it's environment
8. Biosphere
- All regions of Earth that hold life |
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Term
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Definition
Bacteria - no nucleus (prokaryotic)
Archaea prokaryotic
Eukarya> Membrane nucleus
Eukaryotes- includes plants, protists, fungi and animals
Prokaryotes: DNA not contained in nucleus
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Term
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Definition
Fungus: Eukaryotic consumer that obtains nutrients by digestion and absorption outside the body
Protists: Eukaryotes that are not plants, animals or fungi |
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Term
| Four main molecules of life |
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Definition
Carbohydrates
Proteins
Lipids
Nucleic acids |
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Term
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Definition
Carbohydrates: Simple Sugars
Fatty Acids: Lipids
Amino Acids: Proteins
Nucleic Acids: Nucleotides |
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Term
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Definition
Cellulose (structural component of plants)
starch (main energy reserve in plants)
Glycogen (energy reserve in animals) ( found in our muscles) |
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Term
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Definition
| lipid with three fatty acid tails and glycerol |
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Term
Saturated and Unsaturated
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Definition
no double bonds
one or more double bonds |
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Term
Nucleotide & ATP
Components |
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Definition
1. sugar, nitrogen base, phosphate
2. 5 carbon sugar, base,3 phosphate |
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Term
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Definition
Plasma Membrane
Cytoplasm
region of DNA |
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Term
Cell membrane
(Lipid Bilayer)
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Definition
1. Gatekeeper, surrounds the cell and controls which substances move in and out
phospholipids arranged tail to tail in a bilayer
some proteins
Tails don't like water |
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Term
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Definition
| semifluid substance enclosed by a cells plasma membrane |
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Term
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Definition
1. Organelle with 2 membranes that holds a eukaryotic cell's DNA
2. Region of cytoplasm where DNA is concentrated in a prokaryotic cell |
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Term
| Surface area to volume ratio |
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Definition
cells must be small to efficently exchange materials with their enviroment
High (better) |
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Term
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Definition
one or more cells
smallest unit of life
cell arises from another cell
hereditary info is passed to offspring |
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Term
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Definition
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Term
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Definition
permeable structure
peptides and polysaccharides (bacteria)
Proteins (archaeans)
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Term
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Definition
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Term
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Definition
tail - long, slender used for mobility
hairlike- help cells cling or move across surfaces for plasmid transfer |
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Term
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Definition
a double membrane that constitutes the outer boundary of the nucleus
The nucleus (holds DNA) |
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Term
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Definition
1. series of interacting organelles between the nucleus & plasma membrane
2. makes and modifies lipids and proteins
3. recycles molecules and particles usch as a wornout cell parts and inactivates toxins |
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Term
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Definition
a continuous system of sacs and tubes that is an extension of the nuclear envelope
Rough (ribosomes) & Smooth |
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Term
Vesicle
Peroxisome
Lysosome
Golgi Body
Vacuole |
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Definition
1. small, sac like organelle, transports contents
2. enzyme filled vesicle breaks down amino acids, (hydrogen Peroxide)
3. vesicle with enzymes for intracelluar digestion
4. sorts and packages the finished products in to transport vesicles
5. fluid filled that isolates or disposes of wastes,debris or toxic materials |
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Term
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Definition
| double membraned, produces ATP |
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