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49 Cards in this Set
- Front
- Back
Name the 5 characteristics all living things have in common?
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1) organization
2) energy use 3) reproduction 4) adaptation to environment 5) homeostasis |
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basic unit of life?
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cell
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living thing composed of cells?
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organism
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composed of one cell?
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unicellular
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composed of more than one cell?
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multi-cellular
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the cells take on roles dictated by genetic instructions?
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differentiation
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ability to maintain a stable internal environment?
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homeostasis
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process by which organisms use energy?
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metabolism
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what are traits controlled by?
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genes
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type of reproduction where only 1 parent is required?
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asexual reproduction
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type of reproduction that requires 2 parents?
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sexual reproduction
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what is the changing of organisms over time?
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evolution
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evolution occurs through a process called?
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natural selection
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when some substances can easily pass through a membrane and others cannot?
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selectively permeable
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does not require the cell to use energy?
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passive transport
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Name 3 things that are true for all cells?
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1) consist of 1 or more cells
2) are basic structures 3) can reproduce from only existing cells |
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structures within a cell?
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organelles
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cells with a membrane around the nucleus?
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eukaryote
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cells WITHOUT a membrane around the nucleus?
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prokaryotes
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are unicellular organisms such as bacteria?
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prokaryotes
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why do animal cells not have a cell wall, while plants do?
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Most animal cells are flexible for movement, while plants have rigid cell walls for support.
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type of transport that does require a cell to use energy?
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active transport
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simplest form of passive transport?
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diffusion
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transfer of molecules from an area of high concentration to lower concentration?
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diffusion
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amount of solute dissolved in a fixed amount of solution?
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concentration
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energy of motion?
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kinetic energy
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type of energy diffusion uses?
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kinetic energy
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process of water molecules moving down the concentration gradient?
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osmosis
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concentration outside a cell is lower than inside?
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hypotonic
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concentration outside a cell is higher than inside?
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hypertonic
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water moves into the cell to establish equilibrium?
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hypotonic
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water moves out the cell to establish equilibrium?
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hypertonic
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water moves in and out of cell because equilibrium is established?
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isotonic
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occurs when molecules cannot diffuse across a cell membrane?
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facilitated diffusion
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diffusion facilitated by special proteins called?
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carrier proteins
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when a cell must move up a concentration gradient
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active transport
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occurs when external substances are enclosed within a cell
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endocytosis
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occurs when contents are released external to the cell?
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exocytosis
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what are similarities and differences of active and passive transport?
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active transport requires energy other than kinetic. Both active and passive allow movement of substances across a cell.
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study of how traits pass from parent to offspring?
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genetics
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what always has the same traits?
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pure traits
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traits that only occur in the second generation?
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recessive
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multiple forms of a gene?
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alleles
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when both parents give offspring the same allele?
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homozygous
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when parents do not give the same allele to offspring?
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heterozygous
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More water, swell
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hypo
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less water, shrink
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hyper
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haploid
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.
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diploid
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.
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