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46 Cards in this Set
- Front
- Back
- 3rd side (hint)
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_______is th study of the interaction of organisms with their environment and with each other.
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Ecology
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E------
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To function properly, all living things must maintsin a constant internal environment through the process of___________.
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Homeostasis
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H----------
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An educated guess, or (an) __________, may be tested by experimentation.
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Hypothesis
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H---------
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Stating in advance the result that may be obtained from testing a hypothesis is called __________.
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Prediction
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P---------
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A unifying explanation for a broad range of observations is a ______.
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Theory
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T-----
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A __________ experiment is one in which the condition suspected to cause the effect is compared to the same situation without the suspected condition.
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Controlled
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C---------
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the base unit for length in the Systeme International d' Unites (international System of units) is the _____________.
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Meter
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M----
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A____________electron microscope passes a beam of electrons over a specimen's surface, whereas a _______________electron microscope passes a beam of electroins through a thin slice of a specimen.
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a-(SEM) Scanning
b-(TEM) Transmisson |
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Substances that are changed when they become involved in chemical reactions are called _________, while the new substances that are formed are called _______.
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a- Reactants
b- Product |
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Chemical reactions in the body can be speeded up by adding a(n) ________, which lowers the amount of activation energy required to start the reaction.
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Enzyme
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E-----
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A substance that dissolves in another is called a(n) ______.
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Solute
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The energy needed to break existing chemical bonds during the initiation of a chemical reaction is called __________ ______.
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Activation Energy
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_____ is the most common solvent in cells.
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water
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_________ and ________ ions form when water dissociates.
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a. Hydroxide
b. Hydrogen |
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The loss of electrons from a molecule is called _________ ________, while the gain of electrons by a molecule is called _________ ________.
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a. oxidation reaction
b. reduction reaction |
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An acidic solution is one that has more _________ than _________ ____.
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a. hydronium
b. hydroxide ions |
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A solution with a pH of 3 has #### times more hydronium ions than a solution with a pH of 6.
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1,000
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Water is very effective at dissolving other polar substances because of its ________.
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polarity
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Beacause carbon atons have four electrons in their outermost energy level, they can form up to # covalent bonds with other atoms.
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4
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Breaking of ________ bonds is the first thing that happens when water is heated, which means that it takes a great deal of thermal energy to raise the temperature of water.
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Hydrogen
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In the molecule that has the chemical formula C2H4, the carbon atoms are bonded together with a ______ bond.
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double
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In a condensation reaction, two molecules become linked together and a molecule of _____ is produced.
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water
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The formation of polymers from monomers occur as a result of ____________ reactions, and the breakdown of polymers into monomers occurs as a result of __________ reactions
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a. condensation
b. hydrolysis |
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The statement "Cells are produced only from exiting cells" is part of the ___ ______.
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cell theory
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Lipids are ___-_____ molecules because they have no negative and positive poles.
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non-polar
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The ratio of surface area to ______ puts limitations on a cell's size.
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volume
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A substrate attaches to the ______ ____ of an enzyme.
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Active site
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Eukaryotic cells are much larger and have more specialized functions that prokaryotic cells because they contain __________, which carry out specialized activities.
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organelles
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In a triple bond, # pair(s) of electrons is (are) shared between two atoms.
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3
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A cell with a well-defined nucleus and cytoplasm surrounded by a plasma membrane is a(n) __________ cell.
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eukaryotic
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ATP contains # (___) phosphate groups.
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3 (Tri)
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____________ mo'tlecules have "heads" and "tells" and are found in the plasma membrane.
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phospholipid
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Scientist have discovered that cells contain smaller specialized structures known as __________.
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organelles
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Matthias Schleiden worked with _____ cells, and Theodor Schwann worked with ______.
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a. plant
b. animal |
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The spherical organelles that are the site of protein synthesis in a cell are the _________.
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ribosomes
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Some plants produce a _________ ____ between the plasma membrane and the primary cell wall.
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Secondary wall
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The fluid portion of the cytoplasm is called the _______.
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cytosol
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Active Trasport systems are a form of cell transport that requires energy from molecules of ___.
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ATP
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Photosynthesis takes place in the ___________ of plant cells.
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chloroplast
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Both plant and animal cells have plasma membranes. In addition, plant cells are surrounded by a(n) ____ ____.
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Cell wall
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Stacks of thylakoids, called _____, are suspended in the stroma of chloroplasts.
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grana
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Aphotosynthesis pigment that absorbs primarily red and blue wavelengths of light and appears green is called ___________, while pigments that absorb other wavelengths and appear yellow and orange are called ___________.
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a. chlorophyll
b. carotenoids |
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Organisms that harvest energy from either sunlight or chemicals in order to make food molecules are called __________.
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Autotrophs
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The main pigment associated with the two photosystems is ___________.
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chlorophyll
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The abundance of oxygen in Earth's atmosphere is a result of millions of years of ______________.
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Photosynthesis
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Chemiosmosis in the thylakoid membrane results in the synthesis of ___.
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ATP
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