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79 Cards in this Set

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