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79 Cards in this Set
- Front
- Back
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What are the characteristics of living things?
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homeostasis, reproduction, made of cells,
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What does a controlled experiment allows a scientist to isolate and test?
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a single variable
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A well-tested explanation that unifies a broad range of observations is a(an)
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theory
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Which of the following is NOT a characteristic of all living things?
a. growth and development b. ability to move c. response to the environment d. ability to reproduce |
ability to move
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What does cell specialization in multicellular organisms allows cells to do?
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specialize and perform different functions
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The process by which organisms keep their internal conditions relatively stable is called
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homeostasis
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In the metric system, the basic unit of length is the
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meter
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An instrument that allows light to pass through the specimen and uses two lenses to form an image is a(an)
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compound microscope
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What is the term given to a group of cells that develops from a single original cell?
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cell culture
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The best instrument to use to separate the liquid portion from the solid portions in whole blood is a(an)
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centrifuge.
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The three particles that make up an atom are
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proton, neutron, and electron
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The space surrounding the nucleus of an atom contains
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electrons
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The nucleus of an atom is made up of
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protons and neutrons
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What are isotopes?
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atoms of the same element with the same number of protons and a different number of neutrons
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What term terms describes a substance formed by the combination of two or more elements in definite proportions?
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ompound
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A covalent bond is formed as the result of
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sharing an electron pair
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What type of electron is available to form bonds?
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valence or outer energy
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The most abundant compound in most living things is
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water
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When salt is dissolved in water, water is the
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solvent
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A substance with a pH of 6 is called
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an acid
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Which of the following organic compounds is the main source of energy for living things?
a. carbohydrates b. lipids c. nucleic acids d. proteins |
carbohydrate
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What is the process that changes one set of chemicals into another set of chemicals?
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chemical reaction
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What is the term used to describe the energy needed to get a reaction started?
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activation energy
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A substance that accelerates the rate of a chemical reaction is called a(an)
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catalyst
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Enzymes affect the reactions in living cells by changing the
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speed of the reaction
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Who was the first person to identify and see cells?
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Robert Hooke
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Which cell structure contains the cell’s genetic material and controls the cell’s activities?
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nucleus
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Prokaryotes lack
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a nucleus
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What type of organism contains a nucleus?
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eukaryote
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What is the function of the cytoskeleton?
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helps a cell keep its shape
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Which organelle breaks down food into particles the cell can use?
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lysosome
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Which organelle makes proteins using coded instructions that come from the nucleus?
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ribosome
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Which organelle converts food into compounds that the cell uses for growth, development, and movement?
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mitochondrion
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Which organelle would you expect to find in plant cells but not animal cells?
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chloroplast
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The diffusion of water across a selectively permeable membrane is called
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osmosis.
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Which term refers to cells having different jobs in an organism?
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multicellular
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A group of cells that perform similar functions is called a(an)
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tissue.
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What is an organ system?
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group of organs that work together to perform a specific function
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As a cell becomes larger,what happens to the surface area and volume?
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volume increases faster than its surface area.
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What is the cell cycle?
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a series of events that cells go through as they grow and divide.
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The first phase of mitosis is called
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prophase
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During which phase of mitosis do the chromosomes line up along the middle of the dividing cell?
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metaphase
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What is the role of the spindle during mitosis?
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. It helps separate the chromosomes.
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The two main stages of cell division are called
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mitosis and cytokinesis
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Cyclins are a family of closely related proteins that
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. regulate the cell cycle.
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Which of the following is an internal regulator of the cell cycle?
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growth factors
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Cancer is a disorder in which some cells have lost the ability to control their
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rowth rate.
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Cancer cells form masses of cells called
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. tumors.
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What are hybrids?
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Offspring that result from crosses between true-breeding parents with different traits
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The diffusion of water across a selectively permeable membrane is called
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osmosis.
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Which term refers to cells having different jobs in an organism?
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multicellular
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A group of cells that perform similar functions is called a(an)
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tissue.
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What is an organ system?
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group of organs that work together to perform a specific function
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As a cell becomes larger,what happens to the surface area and volume?
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volume increases faster than its surface area.
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What is the cell cycle?
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a series of events that cells go through as they grow and divide.
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The first phase of mitosis is called
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prophase
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During which phase of mitosis do the chromosomes line up along the middle of the dividing cell?
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metaphase
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What is the role of the spindle during mitosis?
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. It helps separate the chromosomes.
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The two main stages of cell division are called
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mitosis and cytokinesis
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Cyclins are a family of closely related proteins that
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. regulate the cell cycle.
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Which of the following is an internal regulator of the cell cycle?
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growth factors
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Cancer is a disorder in which some cells have lost the ability to control their
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rowth rate.
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Cancer cells form masses of cells called
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. tumors.
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What are hybrids?
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Offspring that result from crosses between true-breeding parents with different traits
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The diffusion of water across a selectively permeable membrane is called
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osmosis.
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Which term refers to cells having different jobs in an organism?
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multicellular
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A group of cells that perform similar functions is called a(an)
|
tissue.
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What is an organ system?
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group of organs that work together to perform a specific function
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As a cell becomes larger,what happens to the surface area and volume?
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volume increases faster than its surface area.
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What is the cell cycle?
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a series of events that cells go through as they grow and divide.
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The first phase of mitosis is called
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prophase
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During which phase of mitosis do the chromosomes line up along the middle of the dividing cell?
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metaphase
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What is the role of the spindle during mitosis?
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. It helps separate the chromosomes.
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The two main stages of cell division are called
|
mitosis and cytokinesis
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Cyclins are a family of closely related proteins that
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. regulate the cell cycle.
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Which of the following is an internal regulator of the cell cycle?
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growth factors
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Cancer is a disorder in which some cells have lost the ability to control their
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rowth rate.
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Cancer cells form masses of cells called
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. tumors.
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What are hybrids?
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Offspring that result from crosses between true-breeding parents with different traits
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