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76 Cards in this Set

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What is Biology?
Biology is the study of life
What is Homestasis?
Maintaining a stable level of internal conditions.
(temperature, water)
What is Reproduction?
Involves the transmission of heredity info. from organisms to their offspring
Sexual Reproduction
Heredity information from teo parts of a single organism or two organisms of the same species is combined
asexual reproduction
heredity info. is not from two different organisms. Ex. Bacterium splits into 2
Grow and Evolve
Organisms over time grow bigger. And sometimes evolve into a different type of species but similar characteristics
Autotrophs
Make their own food
Heterotrophs
Get food fro other organisms by eating them.
Organization
Living things are organized and are maintained by a constant input of energy
6 Characteristics of all living things
Composed of cells, highly organized, use energy, maintain homeostasis, grow and evolve and reproduce
What do Scientific Investigations generally begin with?
They usually begin with observations.
What is a hypothesis?
A hypothesis is the statement that explains observations and that can be tested.
What is the independent variable?
The independent variable is the variable that never changes randomly.
What is a microscope?
A microscope is an insturment that produces an enlarged size of an image.
What is magnification?
magnification is the increase of an object's apparent size.
What is a resolution?
The power to show details
Compound Light microscope
Biologists use this tool often to see small organisms such as cells
Transmission Electron Microscope
Can magnify specimen up to 200,000 times. Live specimens cannot be viewed. transmits a beam of electrons through a very thinly sliced specimen.
Scanning Electron Mocroscope
Provides 3-D images. Specimen does not have to be sliced. Specimen is sprayed with a fine metal coating. can magnify up to 100,000 times. Beam of electrons go onto specimen and causes metal to emit a shower of electrons.
What is an element?
Substances that cannot be broken down by chemical means into simpler substances.
What is an atom?
omposed of protons, neutrons and electrons. Protons and neutrons compose the nucleus of an atom. Electrons travel around the nucleus of a cell.
what is a compound?
A compound is composed of the atoms o two elements that are joined by chemical bonds in a fixed proportion.
What is a valance electron?
The elctrons in the outermost energy level of an atom.
What is a covalent bond?
A covalent bond is formed when two atoms share electrons.
What is a molecule
A molecule consisits of two or more atoms held together by covalent bonds.
What is energy?
Energy is defined as the ability to d work or cause change
What do you call when chemical reactions involove a net absorbion of energy?
This is a endergonic reaction.
What is an exergonic reaction?
chemical reactions that involove a net release of energy.
What is the amount of energy required for a chemcal reaction to bein called?
This is clled activation energy.
What are catylsts?
Catylysts lower the lower the amount of activation energy necesary for the reaction to begin.
What is a redox reaction?
A redox reacion is also called a reduction-oxidation reaction. And it is when in a chemical reaction electrons are exchanged between atoms.
Whatis product?
Aproduct is a compound formed by a chemical reaction.
What is an oxdation reaction?
A reactant loses one or more electrons, thus bcoming more positive in charge.
What do you callhe energy in a system thais avaliable for work?
Free energy
What is a solution?
solution cosists of a solute dissolved ina solven. WHich is usually water.
OH- ion(describe)
Hydroxide ion
H3O+ io
Hydronium ion
Saturated solution
A solution which no more solute can dissolve
Wha is dissociation?
seperating of a molecule into simpler molecules, atoms, readicals or ions.
Is water a polar molecule?
yes
What is a polar molcule?
A polar molecule is when electrons areunevely shared bwteen the hydrogen and oxygen atoms.
What does polarity of water do?
The polarity of water makes it effective in dissolving other substces to toher form solutions.
What is hydrogen bonding?
it is responsible for the cohesion and capllarity of water that water molecules display.
What is the type of attrtion that holds water molecules together?
Hydrogen bonding
What is the attraction of like molecules to each other?
It is called cohesion.
What is capillarity?
Capilarity is the reacion of a liquid surface with a solid. Capilarity allows water tocreep up the interior of a narrow vessel
What does water have to do for its temperature to change?
It must gain or lose a relatively large amount of energy.
Does the solid form of water have more or less density than its liquid form?
Less.
WHat does an organic compound contain?
An orangic compound contains carbon that is covalently bonded both to other carbon atoms and often to atoms of other elements, includng oxygen, hydrogen and oxygen.
What is monomer? What do they do?
Simple molecules. Bond to one another to for complex molecules called polymers.
What do monomers do in an condensation reaction?
Monomers are joined to form polymers in an condensation reaction.
What happens to polymers during hydrolysis?
Polymers are broken down into monomers.
What is dehydration synthesis?
Dehydration synthesis is another name for condenstaion, it is when one molecule of water is produced.
What type of compund is alcohol?
Alcohol is an organic compond
What does alcohol contain? (in terms of atoms)
Alcohol conatins a hydroxyl group, OH- attached to one of its carbon atoms
If alcohol is in the hydroxl group is it polar or non polar?
Alcohol is polar
If alcohol is polar will it be able to make hydrogen bonds?
Yes, since it has similar properties as water.
If alcohol is polar will it be able to make hydrogen bonds?
Yes, since it has similar properties as water.
If alcohol is polar will it be able to make hydrogen bonds?
Yes, since it has similar properties as water.
If alcohol is polar will it be able to make hydrogen bonds?
Yes, since it has similar properties as water.
What is ATP?
ATP is adensonine triphosphate. And is the energy for the cell.
What is ATP?
ATP is adensonine triphosphate. And is the energy for the cell.
What is a functional group?
A functional group is a structural building block that determines the characteristics of a chemical compound.
What is ATP?
ATP is adensonine triphosphate. And is the energy for the cell.
Name the 6 functional groups.
hydroxyl(-OH), carbonyl(C=O), carboxyl(//OH), ammino(H/N\H), sulfhydrl(-SH) and phospahte O-P-OH
What is hydrolysis?
hydrolysis is the splitting of the molecule through the reaction with water.
What is a functional group?
A functional group is a structural building block that determines the characteristics of a chemical compound.
Name the 6 functional groups.
hydroxyl(-OH), carbonyl(C=O), carboxyl(//OH), ammino(H/N\H), sulfhydrl(-SH) and phospahte O-P-OH
What is ATP?
ATP is adensonine triphosphate. And is the energy for the cell.
What is a functional group?
A functional group is a structural building block that determines the characteristics of a chemical compound.
What is hydrolysis?
hydrolysis is the splitting of the molecule through the reaction with water.
Name the 6 functional groups.
hydroxyl(-OH), carbonyl(C=O), carboxyl(//OH), ammino(H/N\H), sulfhydrl(-SH) and phospahte O-P-OH
What is a functional group?
A functional group is a structural building block that determines the characteristics of a chemical compound.
What is hydrolysis?
hydrolysis is the splitting of the molecule through the reaction with water.
Name the 6 functional groups.
hydroxyl(-OH), carbonyl(C=O), carboxyl(//OH), ammino(H/N\H), sulfhydrl(-SH) and phospahte O-P-OH
What is hydrolysis?
hydrolysis is the splitting of the molecule through the reaction with water.