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116 Cards in this Set

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defined as...
bio. is bestA. life and life processes.
B. the composition, structure, and properties of substances and the changes they undergo.
C. matter, motion, mechanics, heat, light, electricity, and sound.
D. the earth, especially as recorded in rocks.
life and life processes.
lesson 1
an organism is...
A. an animal but not a plant.
B. the smallest unit that can perform all of the life processes.
C. when a living thing maintains its internal environment.
D. anything made of one or more cells that exhibits all of the characteristics of life.
anything made of one or more cells that exhibits all of the characteristics of life.
lesson 1
Homeostasis is to stability as adaptation is to...
A. development.
B. growth.
C. maintenance.
D. change.
maintenance.
lesson 1
Your heart beats more quickly and you breathe more rapidly after exercising. What characteristic of life does this represent?

A. reproduction
B. adaptation
C. homeostasis
D. organization
homeostasis
lesson 1
The human respiratory and nervous systems are examples of what characteristic of life?

A. reproduction
B. adaptation
C. homeostasis
D. organization
organization
lesson1
Which of the following is not identified correctly?

A. evolution
B. homeostasis
C. organization
D. reproduction
recess bell—stimulus
lesson1
Each of the following is considered an SI measurement except the

A. pound.
B. liter.
C. second.
D. Celsius degree
pound.
lesson1
The next step a scientist takes after forming a hypothesis is to
experiment to test the hypothesis.
lesson1
A student experiments to study the growth of radish roots at ten different temperatures, from 5 degrees Celsius to 45 degrees Celsius. The dependent variable in this experiment would be

A. growth.
B. temperature.
C. roots.
D. Celsius.
temperature.
lesson1
. A test of a hypothesis is called a(n)
experiment.
lesson1
In an experiment, the group in which all conditions are kept the same except for the one being tested is a(n)

A. dependent variable.
B. independent variable.
C. control group.
D. experimental group
experimental group.
The number of red blood cells in a mouse's blood at different iron levels of the mouse's diet is the

A. dependent variable.
B. independent variable.
C. control group.
D. experimental group
dependent variable.
lesson1
A person drinking a glass of water illustrates both biotic and abiotic factors. The water would be
none of the above
lesson1
Autotroph is to producer as heterotroph is to
consumer.
lesson1
Ecology is the study of
interactions between organisms and their environments.
lesson1
A group of organisms of the same species that interbreed and live in the same place is a(n)

A. community.
B. organism.
C. population.
D. ecosystem
population.
lesson1
Interaction between biotic populations and abiotic factors in a community is a(n)

A. community.
B. organism.
C. population.
D. ecosystem.
ecosystem
lesson1
A symbiotic relationship in which both species benefit would be

A. mutualism.
B. parasitism.
C. commensalism.
D. omnivorous
. mutualism
lesson1
A symbiotic relationship in which one species benefits and the other does not benefit or suffer is

A. mutualism.
B. parasitism.
C. commensal.
D. abiotic.
commensal.
lesson1
As water moves through an ecosystem, plants and animals lose the water to the atmosphere through

A. photosynthesis.
B. dehydration.
C. precipitation.
D. respiration.
respiration
lesson1
Atmospheric nitrogen is converted into usable nitrogen compounds by

A. bacteria.
B. heterotrophs.
C. plants.
D. carnivores.
bacteria.
lesson1
The total transfer of energy from one trophic level to another that an organism can use is

A. 10 percent.
B. 30 percent.
C. 50 percent.
D. 70 percent.
70 percent
Which of the following is part of a community?

A. soil
B. rocks
C. plants
D. water
water
What vital function is performed by fungi and bacteria in an ecosystem?

A. photosynthesis
B. decomposition
C. commensalism
D. all of the above
decomposition
lesson1
Plants are classified as

A. producers because they produce carbon dioxide when they respire.
B. producers because they capture energy from the sun.
C. consumers because they feed on bacteria from the soil.
D. consumers because they use the energy they produce.
consumers because they use the energy they produce.
lesson1
You would receive more energy when consuming a steak than a salad.

A. True
B. False
True
lesson1
Carbon dioxide is returned to the earth's atmosphere when

A. trees are planted.
B. animal extinction is prevented.
C. fossil fuels are burned.
D. plastic is used.
trees are planted.
lesson1
Cows are to herbivores as humans are to

A. omnivores.
B. carnivores.
C. herbivores.
D. detritivores
omnivores
lesson1
The number of trophic levels in an ecosystem is limited because

A. carnivores are near extinction.
B. so much energy is lost at each level.
C. plants produce less energy today than they did 100 years ago.
D. of the abiotic factors present.
so much energy is lost at each level.
lesson1
Habitat is to house as niche is to

A. profession.
B. mansion.
C. wealth.
D. possessions.
profession
lesson1
Homeostasis in a cell is primarily maintained by the

A. glucose.
B. mitochondria.
C. plasma membrane.
D. DNA.
C. plasma membrane
lesson4
The property of the plasma membrane that allows certain particles to pass through and keeps other particles out is known as

A. selective permeability.
B. diffusion.
C. dynamic equilibrium.
D. turgor pressure.
A. selective permeability.
lesson4
The net movement of particles from an area of higher concentration to an area of lower concentration is called

A. active transport.
B. osmosis.
C. diffusion.
D. selective permeability.
C. diffusion
lesson4
When a few drops of food coloring are dropped into a cup of water, they will

A. move from low to high concentration.
B. move from high to low concentration.
C. remain separated from the water.
D. drop to the bottom of the cup and remain separate from the water.
B. move from high to low concentration.
lesson4
When materials pass into and out of the cell at equal rates and there is no net change in concentration inside of the cell, the cell is said to be in a state of

A. hypertonic solution.
B. active transport.
C. hypotonic solution.
D. dynamic equilibrium.
D. dynamic equilibrium.
lesson4
. The difference in concentration from one region to another is called

A. dynamic equilibrium.
B. homeostasis.
C. turgor pressure.
D. the concentration gradient.
D. the concentration gradient.
lesson4
If the concentration of dissolved substances in a solution is lower than the concentration inside of the cell, the solution is

A. isotonic.
B. hypotonic.
C. hypertonic.
D. dynamic.
B. hypotonic.
lesson4
Water will enter a cell by osmosis and result in turgor pressure when the cell is placed in a(n)

A. isotonic solution.
B. hypotonic solution.
C. hypertonic solution.
D. dynamic solution.
C. hypertonic solution.
lesson4
The type of solution that will not cause cellular damage when injected into the body because net osmosis does not occur is a(n)

A. isotonic solution.
B. hypotonic solution.
C. hypertonic solution.
D. diffusion solution.
A. isotonic solution.
lesson4
The type of solution that will not cause cellular damage when injected into the body because net osmosis
does not occur is a(n)

A. isotonic solution.
B. hypotonic solution.
C. hypertonic solution.
D. diffusion solution
isotonic solution
lesson4
Which of the following is not true of active transport?

A. It defies the concentration gradient.
B. It requires the cell to expend energy.
C. Proteins help the cell carry out active transport.
D. Osmosis is an example of active transport.
D. Osmosis is an example of active transport.
lesson4
Each of the following is needed to carry out photosynthesis except

A. oxygen.
B. carbon dioxide.
C. chlorophyll.
D. water.
A. oxygen.
lesson4
The Calvin cycle involves the

A. formation of carbohydrates in plants.
B. breakdown of carbohydrates in animals.
C. division of the cell.
D. production of ATP molecules.
A. formation of carbohydrates in plants
lesson4
The Calvin cycle takes place in the

A. stroma of chloroplasts.
B. mitochondria.
C. ribosomes.
D. chromosomes.
A. stroma of chloroplasts
lesson4
Photosynthesis is to building carbohydrates as __________ is to breaking down carbohydrates.

A. the Calvin cycle
B. diffusion
C. respiration
D. mitosis
C. respiration
lesson4
Heterotrophs get their energy directly from

A. the sun.
B. photosynthesis.
C. food.
D. mitosis.
B. photosynthesis
lesson4
Photosynthesis is to oxygen as respiration is to

A. simple sugars.
B. chlorophyll.
C. carbon dioxide.
D. hydrogen.
C. carbon dioxide
lesson4
The energy-storing compounds of the cell are called

A. mitochondria.
B. ATP.
C. DNA.
D. proteins.
B. ATP.
lesson4
Energy-storing compounds of the cell are formed in the "powerhouse" of the cell known as the

A. mitochondrion.
B. nucleus.
C. ribosome.
D. chromosome.
A. mitochondrion.
lesson4
Chloroplasts are found in

A. plants.
B. animals.
C. both plants and animals.
D. ATP molecules
A. plants.
lesson4
Deforestation is related to the upset of

A. the Calvin cycle.
B. photosynthesis and respiration.
C. the cell cycle.
Deforestation is related to the upset of

A. the Calvin cycle.
B. photosynthesis and respiration.
C. the cell cycle.
D. dynamic equilibrium.
D. dynamic equilibrium.
lesson4
Each of the following is a reason why cells must remain small except

A. diffusion is a primary means of cellular transport.
B. there is a limited amount of DNA.
C. the surface area-to-volume ratio is limiting.
D. the plasma membrane is unable to change shape
D. the plasma membrane is unable to change shape
lesson4
The stringy structures that appear in the cell nucleus just before division are

A. chromosomes.
B. RNA.
C. chloroplasts.
D. ADP.
A. chromosomes.
lesson4
The period of cell growth is known as

A. the Calvin cycle.
B. interphase.
C. mitosis.
D. respiration.
B. interphase.
lesson4
The period in which the nucleus and cytoplasm divide and a set of chromosomes is distributed to each daughter cell is known as

A. the Calvin cycle.
B. interphase.
C. mitosis.
D. respiration.
C. mitosis.
lesson4
426 . Anaphase: Centromeres split and sister chromatids are pulled to opposite polls of the cell.

A. first
B. second
C. third
D. fourth
C 3rd
lesson4
27 . Prophase: Chromatin coils to form visible chromosomes, the nuclear envelope and nucleolus disappear, and a spindle forms between the pairs of centrioles that have moved to opposite ends of the cell.

A. first
B. second
C. third
D. fourth
A 1st
lesson4
28 . Telophase: With a complete set of chomosomes at each end of the cell, the cytoplasm divides.

A. first
B. second
C. third
D. fourth
D4th
lesson4
Metaphase: Chromosomes move to the equator of the spindle, with each chromatid attached to a separate spindle fiber by its centromere

A. first
B. second
C. third
D. fourth
B2nd
lesson4
When normal cells are allowed to grow in a dish that contains nutrients, the cells will

A. flourish in the environment and eventually spill out of the dish as it becomes too full to contain all of the cells.
B. continue to divide until they cover the bottom of the dish and touch all sides.
C. not grow in an environment outside of the body.
D. live but stay in interphase and never reach the stage of mitosis.
B. continue to divide until they cover the bottom of the dish and touch all sides.
lesson4
1 . The orderly, natural changes that take place in a community as environmental conditions change is a process called

A. climax.
B. succession.
C. pollution.
D. carrying capacity.
B. succession.
lesson 2
When new sites of land are formed, as in a lava flow, (1) what are the first organisms to colonize the new area, and (2) what is the colonization called?

A. pioneer; secondary succession
B. primary; climax
C. pioneer; primary succession
D. inhabitants; biome
C. pioneer; primary succession
lesson 2
A sequence of community changes that occur as a result of a natural disaster, such as a forest fire, is called

A. primary succession.
B. secondary succession.
C. climax.
D. carrying capacity.
B. secondary succession
lesson 2
A climax community of any ecosystem on Earth is determined by its

A. shoreline.
B. resources.
C. carrying capacity.
D. climate.
B. resources
lesson 2
A large group of ecosystems that share the same climate is called a

A. biosphere.
B. biome.
C. trophic level.
D. nonrenewable resource.
A. biosphere
lesson 2
The body of water where fresh water from a river mixes with salt water is called a(n)

A. estuary.
B. intertidal zone.
C. sandbar.
D. aphotic zone.
A. estuary.
lesson 2
The terrestrial biome with the greatest biodiversity is called a

A. desert.
B. taiga.
C. grassland.
D. tropical rain forest
D. tropical rain forest
lesson 2
The most common biome that is also known as the breadbasket of the world is called a

A. tundra.
B. tropical rain forest.
C. temperate forest.
D. grassland.
D. grassland.
lesson 2
Approximately 75 percent of Earth is

A. terrestrial.
B. aquatic.
C. desert.
D. uninhabited.
B. aquatic.
lesson 2
The biome that has coniferous forests, peat swamps, and long, harsh winters is called a

A. tropical rain forest.
B. taiga.
C. tundra.
D. temperate forest.
B. taiga.
lesson 2
13 . The number of organisms that a population can support over an indefinite period of time is called its

A. biodiversity.
B. climate.
C. ecosystem.
D. carrying capacity.
D. carrying capacity.
lesson 2
The most important factor that determines population growth of an organism is

A. its social pattern.
B. its reproductive pattern.
C. its feeding pattern.
D. whether the organism is part of a climax community.
A. its social pattern.
lesson 2
Populations of organisms tend to grow at

A. linear rates.
B. exponential rates.
C. slow rates.
D. unpredictable rates.
C. slow rates.
lesson 2
Zero population growth refers to

A. births exceeding deaths.
B. deaths exceeding births.
C. births equalling deaths.
D. a decrease in births combined with an increase in deaths
D. a decrease in births combined with an increase in deaths
lesson2
Which of the following is a density independent factor?

A. disease
B. drought
C. competition for food
D. none of the above
B. drought
lesson2
China currently

A. is attempting to expand its population.
B. is faced with exponential population growth.
C. has government policies that control population growth.
D. is facing drastic reductions in population
C. has government policies that control population growth.
lesson2
Renewable resources are those that

A. are man-made.
B. are so abundant that we can never run out.
C. are replaced naturally in the environment.
D. people can artificially cause nature to produce
C. are replaced naturally in the environment.
lesson2
Each of the following is considered a nonrenewable resource except

A. oil, coal, and natural gas.
B. topsoil.
C. carbon, nitrogen, and oxygen.
D. groundwater.
C. carbon, nitrogen, and oxygen.
lesson2
What type of scale is used to determine the acidity in the environment?

A. Fahrenheit
B. pH
C. Celsius
D. CFC
B. pH
lesson2
The process whereby radiant energy from the sun is retained as heat in atmospheric gases is called

A. ozone.
B. the greenhouse effect.
C. pollution.
D. acid rain.
B. the greenhouse effect.
lesson2
Rachel Carson's book, Silent Spring, dealt with environmental concern over

A. acid rain.
B. pollution from insecticides.
C. global warming.
D. ozone depletion.
B. pollution from insecticides.
lesson2
Herbicides, pesticides, insecticides, and fertilizers are partially of concern because they cause

A. ozone depletion.
B. global warming.
C. acid rain.
D. groundwater pollution.
A. ozone depletion.
lesson2
Which one of the following can be most faulted for acid rain?

A. species extinction
B. chlorofluorocarbons
C. fertilizers, pesticides, and insecticides
D. sulfur produced by industrial smokestacks
D. sulfur produced by industrial smokestacks
lesson2
27 . The amount of Earth's freshwater supply available to plant and animal life is approximately

A. 0.1 percent.
B. 10 percent.
C. 50 percent.
D. 75 percent.
A. 0.1 percent.
lesson2
Scientists feel the depletion of the earth's ozone is partly because of

A. pH.
B. sulfur.
C. the burning of fossil fuels.
D. CFCs.
D. CFCs.
lesson2
Efforts to protect endangered species have prevented all extinction since the age of the dinosaur.

A. True
B. False
B. False
lesson2
1 . A cell is to an organism as a(n) __________ is to an element.

A. electron
B. nucleus
C. energy level
D. atom
D. atom
lesson3
2 . The periodic table lists

A. atoms.
B. elements.
C. classes of organisms.
D. biomes.
B. elements.
lesson3
Carbon and three other elements make up 96 percent of human mass. The other three elements include each of the following except

A. iron.
B. hydrogen.
C. oxygen.
D. nitrogen.
A. iron.
lesson3
What is the maximum number of electrons in the first energy level?

A. 2
B. 8
C. 18
D. none of the above
A. 2
lesson3
If the atomic number of oxygen is 8, we know that it has

A. 16 electrons.
B. 8 protons.
C. 4 protons and 4 neutrons.
D. both A and B.
C. 4 protons and 4 neutrons.
lesson3
Which of the following has a net charge?

A. compounds
B. ions
C. molecules
D. neutrons
D. neutrons
lesson3
H2O can best be categorized as a(n)

A. gas.
B. element.
C. atom.
D. compound.
D. compound.
lesson3
Carbon, the substance represented by the letter "C" on the periodic table, can best be categorized as a(n)

A. compound.
B. molecule.
C. element.
D. atom.
C. element.
lesson3
. The type of bond that atoms form when they share electrons is a(n)

A. ionic bond.
B. covalent bond.
C. hydrogen bond.
D. none of the above.
B. covalent bond.
lesson3
Atoms naturally form bonds in order to

A. increase their stability.
B. become larger.
C. form useful substances.
D. none of the above.
A. increase their stability.
lesson3
What makes up between 70 and 95 percent of an organism?

A. NaCl
B. H2O
C. carbohydrates
D. lipids
B. H2O
lesson3
12 . made up of a sugar, phosphate group, and nitrogen base that combine to form

A. carbohydrates
B. lipids
C. proteins
D. nucleic acids

a nucleotide
D
lesson3
13 . made from glycerol and fatty acids

A. carbohydrates
B. lipids
C. proteins
D. nucleic acids
B
lesson3
14 . include DNA and RNA

A. carbohydrates
B. lipids
C. proteins
D. nucleic acids
D
lesson3
15 . made up of amino acids

A. carbohydrates
B. lipids
C. proteins
D. nucleic acids
C
lesson3
16 . provide an organism with a genetic code
D
lesson3
17 . used for long-term energy storage, for insulation, and as a protective coating for organs
B
lesson3
18 . can be monosaccharides, disaccharides, or polysaccharides
A
lesson3
19 . include enzymes that help to speed up chemical reactions which take place in the body
C
lesson3
20 . A prokaryote

A. is an organism with a cell that lacks internal, membrane-bound structures.
B. has a defined nucleus.
C. is either single-celled or made up of many cells.
D. has many organelles.
A. is an organism with a cell that lacks internal, membrane-bound structures.
lesson3
21 . Humans are

A. prokaryotic.
B. eukaryotic.
C. both of the above.
D. none of the above.
B. eukaryotic.
lesson3
22 . A plasma membrane

A. is inflexible and causes the cell to take on a permanent shape.
B. is not found in animal cells.
C. controls the movement of materials that enter and exit the cell.
D. all of the above.
C. controls the movement of materials that enter and exit the cell.
lesson3
23 . The organelle that manages cell functions in a eukaryotic cell is the

A. mitochondrion.
B. nucleus.
C. plasma membrane.
D. ER.
B. nucleus.
lesson3
24 . Which of the following is found inside of the nucleus?

A. the cytoplasm
B. ribosomes
C. DNA
D. the Golgi apparatus
C. DNA
lesson3
25 . Which cell organelle is responsible for the manufacture of proteins?

A. the nucleus
B. the ER
C. ribosomes
D. lysosomes
C. ribosomes
lesson3
26 . Cell organelles that are responsible for digesting worn-out cell parts and helping to remove cell waste are called

A. vacuoles.
B. lysosomes.
C. mitochondria.
D. ribosomes.
B. lysosomes.
lesson3
27 . Cell organelles that break down food molecules to produce a usable form of energy for the cell are known as the

A. lysosomes.
B. cytoplasm.
C. nucleus.
D. mitochondria.
D. mitochondria.
lesson3
28 . A valid scientific theory can be formed once an experiment proves a hypothesis to be correct.

A. True
B. False
B. False
lesson3
29 . The fluid inside of the cell is known as the

A. cytoplasm.
B. Golgi apparatus.
C. vacuole.
D. ER.
A. cytoplasm.
lesson3
30 . The factor that had the most impact on scientists' ability to develop the cell theory was the

A. identification of elements.
B. development of the telescope.
C. development of the microscope.
D. new interest in medicine that developed in the 1600s.
C. development of the microscope.
lesson3