Which%20part%20of%20a%20cell%20allows%20nutrients%20and%20other%20materials%20to%20enter%20or%20leave%20the%20cell?

1
Which part of a cell allows nutrients and other
materials to enter or leave the cell?

1. Cytoplasm
2. Nucleus
3. Chloroplast
4. Cell membrane

2
Which human body system controls production of
the hormones that regulate body functions?

1. digestive
2. endocrine
3. respiratory
4. skeletal

3
Hereditary information is found in a cells

1. chloroplasts
2. chromosomes
3. cytoplasm
4. membranes

4
What is a major cause of variation within a
species?

1. Sexual reproduction
2. Asexual reproduction
3. extinction
4. photosynthesis

5
Which of the following is not responsible for
recycling dead organic material?

1. fungi
2. vultures
3. bacteria
4. trees

6
A male chimpanzee has 48 chromosomes in each of
his regular body cells. How many chromosomes
would be found in each of his sperm cells?

1. 96
2. 48
3. 24
4. 12

7
Which body system in humans transports materials
needed for survival?

1. circulatory
2. digestive
3. excretory
4. respiratory

8
The energy content of food is measured in

1. ounces
2. degrees
3. grams
4. calories

9
Every cell contains

1. The same cell structure
2. Common features as well as differences that
   determine the cells structure and function
3. Genes from two parents
4. The same DNA sequence

10
Short-term changes in available food, moisture,
or temperature of an ecosystem may result in a
change in

1. The number of organisms in the population
2. The average size of individuals in a population
3. The behavior of individuals in a population
4. All of the above

11
Organisms that have two parents

1. Receive traits from only one parent
2. Receive a full set of genetic instructions with
   individual traits from each parent
3. Exhibit traits from only one parent
4. Exhibit recessive traits from each parent

12
Which of the following is not a short-term
environmental change?

1. Heat wave
2. recession
3. flood
4. drought

13
Which are produced during photosynthesis?

1. Carbon dioxide and minerals
2. Carbon dioxide and sugar
3. Oxygen and minerals
4. Oxygen and sugar

14
In pea plants, tall is dominant over short. What
size pea plants will result when a pure tall
plant is crossed with a pure short plant?

1. Middle sized plants
2. Short plants
3. Tall plants
4. Some tall and some short plants

15
Animals get energy from the food they eat. What
is the original source of this energy?

1. Nitrogen compounds in the soil
2. Sugars produced by plants
3. Radiant energy from the sun
4. Decaying organic matter

16
Which statement about cells is not true?

1. Cells are the basic UNIT OF structure and
   function in living things
2. Cells are produced from nonliving materials
3. Cells contain many chemicals
4. Cells make up all living things

17
The cell structure that makes a plant cell more
rigid than an animal cell is the

1. Cell membrane
2. cytoplasm
3. Cell wall
4. ribosome

18
The most important role of decomposers in an
ecosystem is their ability to

1. Return dead plant and animal nutrients to the
   soil
2. Convert the suns light energy into stored energy
3. Withstand extreme temperature and drought
   conditions
4. Serve as a major food source for animals

19
Your community is planning to build a new
sanitary landfill. In locating the landfill,
which is the most important environmental
consideration?

1. The cost of the land
2. The location of the groundwater
3. The proximity to an industrial park
4. The accessibility to a major highway

20
Which statement about these cells is true?

1. Cell Y is rigid cell Z is not
2. Cell Y uses oxygen cell Z does not
3. Cell Z makes its own food cell Y does not
4. Cell Y needs water cell Z does not

21
To study of the relationship between the
atmospheric oxygen and the number of trees on the
planet, which of the following must be taken into
account?

1. The average mass of a tree
2. The production of oxygen from sources other than
   trees
3. The commercial use of trees
4. The location of the nearest forest

22
Betsey wants to find out if the rainwater in her
to town contains pollutants. The best way to
determine this would be to examine

1. One sample of rainwater the next time it rains
2. One sample of rainwater collected each time it
   rains over the course of several weeks
3. Several samples of rainwater the next time it
   rains
4. Several samples of rainwater collected at
   different locations in town each time it rains
   over the course of several weeks

23
The reproductive organs of a rose bush are found
in

1. The stem
2. The flower
3. The thorns
4. The leaves

24
Which of the following is responsible for
pollination in seed plants?

1. insects
2. wind
3. Birds and other animals
4. All of the above

25
Sperm cells produced by a plant are found in

1. The pollen
2. A bud
3. The ovary
4. The ripened fruit

26
To maximize efficiency, a plant would utilize all
wavelengths of light in photosynthesis. What,
then, should the optimal leaf color be?

1. green
2. blue
3. black
4. white

27
Which of the following is not an important part
of the water cycle?

1. evaporation
2. condensation
3. Seed dispersal
4. Cloud formation

28
The scientific method includes all of the
following except

1. Forming a hypothesis
2. Drawing conclusions
3. Conducting an experiment
4. Following safety procedures

29
What is a hypothesis?

1. A question
2. A possible explanation or answer to a question
3. An experiment
4. A conclusion

30
Features that are inherited from ones parents
are called

1. Genetic traits
2. Acquired traits
3. habits
4. Learned behaviors

31
Mark A if the scenario is possibleMark B if
impossibleMark C if not enough
information(Blond hair is recessive)

• John has blond hair. Both of his parents have
  brown hair.

32
Mark A if the scenario is possibleMark B if
impossibleMark C if not enough
information(Blond hair is recessive)

• Betty has brown hair. Both of her parents have
  blonde hair.

33
Mark A if the scenario is possibleMark B if
impossibleMark C if not enough
information(Blond hair is recessive)

• James has blond hair. His father has brown hair
  and his mother has blond hair.

34
Mark A if the scenario is possibleMark B if
impossibleMark C if not enough
information(Blond hair is recessive)

• Tammy has blond hair. Her mother has brown hair.

35
Antibiotics are effective against diseases caused
by

1. bacteria
2. viruses
3. All microorganisms
4. Viruses and bacteria

36
Match each plant part with its best definition

• Leaf A. transports water to leaves
• Stem B. Reproductive organ
• Flower C. Absorbs water and minerals from the
  soil
• Bud D. Outer part of stem of wood plant
• Bark E. Area of growth
• Root F. Makes food for plants

37
When classifying organisms, what is the largest
group scientists use?

1. kingdom
2. genus
3. class
4. species

38
What is the smallest group?

1. kingdom
2. genus
3. class
4. species

39
Which of the following is not biodegradable?

1. paper
2. cardboard
3. leaves
4. plastic

40
All of the following are effects of rainforest
destruction except

1. Global warming
2. Increased levels of carbon dioxide in the
   atmosphere
3. Destruction of the ozone layer
4. Extinction of plant and animal species that
   inhabit the rainforest

41
If you need to measure out 10 grams of sodium for
an experiment, which piece of lab equipment would
you use?

1. A microscope
2. A triple beam balance
3. A teaspoon
4. A ruler

42
Spider monkeys spend most of their lives in
trees. These monkeys probably evolved from
monkeys with

1. Longer tails that could grasp branches
2. The ability to run quickly
3. Heavier and more muscular bodies
4. All of the above

43
In which part of the cell does photosynthesis
occur?

1. nucleus
2. Cell wall
3. vacuole
4. chloroplast

44
In which part of the cell are proteins made?

1. mitochondria
2. Cell wall
3. ribosomes
4. nucleus

45
During photosynthesis, plant cells use the energy
from the sun to make food from

1. Oxygen and water
2. Carbon dioxide and water
3. Nitrogen and oxygen
4. Nitrogen and water

46
During respiration, cells break down food
molecules to produce

1. Oxygen for the cell
2. Energy for the cell
3. minerals
4. proteins

47
The products of photosynthesis are recycled
through the process of cellular

1. metabolism
2. Protein synthesis
3. respiration
4. reproduction

48
Most of the energy used by the cell is made in the

1. cytoplasm
2. nucleus
3. mitochondria
4. vacuoles

49
Similar cells that are grouped together and
perform a specific function

• cells
• tissues
• Organ systems
• organelles

50
Egg cells and sperm cells are involved in sexual
reproduction. They are called gametes. What
percentage of genetic material of their parent
cells so they contain?

1. 100
2. 75
3. 50
4. 25

51
Mitosis is a part of the cell cycle. During
mitosis which of the following occurs?

1. Cell grows to its mature size
2. Cell makes a copy of its genetic material
3. Cell divides in two
4. A copy of the cells genetic material is
   distributed to opposite ends of the cell

52
Organisms that carry two identical genes for a
trait are called

1. codominant
2. homozygous
3. heterozygous
4. hybrids

53
Natural selection can result in

1. the extinction of a species
2. The evolution of a new species
3. Adaptations in a species
4. All of the above

54
Sexual reproduction occurs in

1. plants
2. animals
3. Some single-celled organisms
4. All of the above

55
All of the following are invertebrates except

1. insects
2. frogs
3. jellyfish
4. snails

56
Which of the following animals is a vertebrate?

1. A snake
2. A slug
3. A millipede
4. A worm

57
Which of the following organisms are not
single-celled organisms?

1. bacteria
2. Protozoans
3. yeast
4. jellyfish

58
Insects and spiders are examples of arthropods.
These invertebrates all have

1. An internal skeleton
2. An external skeleton
3. A soft body with no skeleton
4. scales

59
Plant and animal cells have many of the same cell
structures. Animal cells, however, do not have

1. cytoplasm
2. Cell walls
3. Nuclear membranes
4. chromosomes

60
The parts of a cell that store food and water are
the

1. ribosomes
2. lysosomes
3. vacuoles
4. chloroplasts

61
The scientists who studied heredity using pea
plants was

1. Gregor Mendel
2. Charles Darwin
3. Robert Hooke
4. Anton van Leeuwenhoek

62
To produce fertile offspring, organisms must be
members of the same

1. genus
2. species
3. kingdom
4. habitat

63
A prokaryote is an organism whose cells do not
have

1. A cell wall
2. Genetic material
3. A nucleus
4. ribosomes

64
An autotroph is an organism that

1. Consumes plants
2. Consumes animals
3. Absorbs nutrients from decaying organic matter
4. Makes its own food

65
Match each group of living things with the best
description

• Plants A. A mix of microorganisms with
  different characteristics
• Fungi B. One of two groups of simple
  single-celled organisms
• Animals C. Multicellular organisms that make
  their own food
• Eubacteria D. Multicellular organisms that must
  get their food from another source
• Protists E. Simple single-celled organisms that
  survive in extreme conditions
• Archae-
• bacteria F. Organisms that feed mostly on dead
  or decaying organisms.

66
An organ system is made up of many different

1. cells
2. organs
3. tissues
4. All of the above

67
Which statement is not true?

1. A cells genetic material contains all the
   information a cell needs to function
2. A cells genetic material is made of DNA
3. All the cells in a multicellular organism contain
   the same genetic material
4. When an organism reproduces, exact copies of its
   genetic material are always passed on to the
   offspring

68
Which of the following organisms maintain a
constant internal body temperature?

1. fish
2. reptiles
3. insects
4. mammals

69
All of the following are protists except

1. algae
2. mushrooms
3. paramecia
4. amoeba

70
Animals obtain oxygen from their environment in
many ways. Which is not a structure used by an
animal to obtain oxygen

1. gills
2. lungs
3. Moist skin
4. scales

71
The stomach, liver and pancreas are part of what
organ system in humans?

1. respiratory
2. digestive
3. nervous
4. excretory

72
The skin and sense organs are part of what organ
system in humans?

1. respiratory
2. digestive
3. nervous
4. excretory

73
Which organ system controls an animals response
to a stimulus?

1. respiratory
2. digestive
3. nervous
4. excretory

74
Plants as well as animals have vascular tissues
which transport materials throughout the
organism. Which of the following is a type of
plant vascular tissue?

1. The cuticle
2. The stamen
3. The pistol
4. The xylem

75
A red tide is caused by an overgrowth of

1. plants
2. algae
3. fish
4. insects

76
An herbivore is a

1. Primary consumer
2. Secondary consumer
3. A producer
4. None of the above

77
Which of the following organisms is not a
consumer?

1. A deer
2. A rabbit
3. A caterpillar
4. An oak tree

78
Living things are classified according to

1. How similar they are
2. How they move
3. Where they live
4. What they eat

79
Which of the following features might you find in
plants that live in a dry desert climate?

1. A thick waxy leaf covering
2. Deep roots
3. Extensive shallow roots
4. All of the above

80
Stomata are openings found

1. On the top of a leaf
2. In plant cell walls
3. On the underside of the leaf
4. On roots and stems

81
A trait that is not passed on to an organisms
offspring

1. Is an acquired trait
2. Is an inherited trait
3. Will play a role in the evolution of the species
4. Is an adaptation

82
Evolutionary relationships between living things
are determined by examining

1. Similarities in DNA sequences
2. Similarities in body structures
3. Similarities in development before birth
4. All of the above

83
Each of the following is an example of an
organism in a stage of metamorphosis except a

1. cocoon
2. Newly hatched chick
3. caterpillar
4. tadpole

84
In sexual reproduction, the union of the egg and
sperm is called

1. mitosis
2. meiosis
3. metamorphosis
4. fertilization

85
If two species share a common ancestor,

1. They have similar DNA sequences and body
   structures
2. One is directly descended from the other
3. They share a similar habitat
4. They are totally unrelated

86
The gene for brown eyes (B) is dominant in
humans. The gene for blue eyes (b) is recessive.

• father
• mother
• What color eyes does the father have?

B B
B BB BB
b Bb Bb
87
The gene for brown eyes (B) is dominant in
humans. The gene for blue eyes (b) is recessive.

• What color eyes does the mother have?

B B
B BB BB
b Bb Bb
88
The gene for brown eyes (B) is dominant in
humans. The gene for blue eyes (b) is recessive.

• What is the probability that any one of their
  offspring will have brown eyes?

B B
B BB BB
b Bb Bb
89
The gene for brown eyes (B) is dominant in
humans. The gene for blue eyes (b) is recessive.

• What is the probability that any one of their
  offspring will have blue eyes?

B B
B BB BB
b Bb Bb
90
The gene for brown eyes (B) is dominant in
humans. The gene for blue eyes (b) is recessive.

• What is the genotype for blue eyes?

91
The gene for brown eyes (B) is dominant in
humans. The gene for blue eyes (b) is recessive.

• Which parent is homozygous for eye color?

B B
B BB BB
b Bb Bb
92
The gene for brown eyes (B) is dominant in
humans. The gene for blue eyes (b) is recessive.

• Which parent is heterozygous for eye color?

B B
B BB BB
b Bb Bb
93
The gene for brown eyes (B) is dominant in
humans. The gene for blue eyes (b) is recessive.

• If the father had blue eyes, what percentage of
  the offspring would have blue eyes?

B B
B BB BB
b Bb Bb
94
Which of the following is an adaptation you might
find in a predator?

1. Sharp pointed teeth
2. Broad flat teeth
3. Traveling in a large herd
4. Hard protective shell

95
Which of the following is not an adaptation to
life totally out of water?

1. Thick scaly skin
2. Kidneys that can concentrate urine
3. A skeleton made of cartilage
4. Eggs with a shell and membranes to prevent water
   loss

96
Which group of vertebrates was the first to adapt
to life totally out of water?

1. mammals
2. dinosaurs
3. reptiles
4. birds

97
Which group of vertebrates have members that lay
eggs?

1. fish
2. reptiles
3. birds
4. All of the above

98
Which group of vertebrates includes organisms
whose eggs are incubated internally in a
structure called a placenta?

1. mammals
2. reptiles
3. birds
4. fish

99
Which of the following types of plants do not
form seeds?

1. mosses
2. Pine trees
3. Flowering plants
4. Fruit trees

100
When an antibiotic is used too frequently it can
lead to

1. New types of viral infections
2. More colds and flu
3. Bacterial infections that are hard to treat
4. None of the above

101
Recessive genes are

1. Never expressed
2. Only expressed in the absence of the dominant
   gene
3. Expressed in heterozygous individuals only
4. None of the above

102
Two organisms in the same kingdom and class

1. Are always members of the same species
2. Are more closely related than organisms in the
   same kingdom but different classes
3. Are more closely related than organisms in the
   same genus but different species
4. Cannot be members of the same species

103
A well-designed experiment tests the affects of
how many variables?

1. One
2. Two
3. Ten or more
4. As many as possible

104
All of the following are part of the scientific
method except

1. Stating the hypothesis
2. Organizing and analyzing the data
3. Discarding confusing or conflicting data
4. Drawing a conclusion

105
All living things share certain characteristics.
Which of the following characteristics is not
common to all living things?

1. They grow
2. They are usually made up of many cells
3. They use energy
4. They reproduce

106
What type of consumer would eat insects and seeds?

1. A carnivore
2. An herbivore
3. An omnivore
4. All of the above

107
Cells are made mostly of

1. proteins
2. sugars
3. DNA
4. water

108
Microorganisms that live in fresh water cannot
live in salt water because

1. Their cells would shrink
2. Their cells would swell and burst
3. Their cells would mutate
4. None of the above

109
A living thing needs all of the following except

1. energy
2. water
3. sunlight
4. To exchange gases with its environment

110
The process that removes salt from ocean water so
it can be used by humans is called

1. desalination
2. precipitation
3. conjugation
4. propagation

111
Cell walls are made of a substance called

1. cholesterol
2. cellulose
3. chlorophyll
4. cartilage

112
A nuclear membrane surrounding the genetic
material of a cell is

1. bacteria
2. prokaryotes
3. All cells
4. eukaryotes

113
The process whereby two bacteria exchange genetic
information is called

1. fertilization
2. mitosis
3. Binary fission
4. conjugation

114
Most of the oxygen in Earths atmosphere is made
by

1. plants
2. bacteria
3. Plant-like protists called algae
4. animals

115
Bacteria are responsible for many cases of

1. malaria
2. Strep throat
3. The common cold
4. Chicken pox

116
Malaria is an example of a disease caused by a

1. Soil bacteria
2. virus
3. Single-celled protist
4. yeast

117
Bacteria can be used to

1. Produce medicines
2. Clean up oil spills
3. Make foods such as cheese and yogurts
4. All of the above

118
The products of cellular respiration become the
raw materials of which process?

1. Protein synthesis
2. DNA replication
3. photosynthesis
4. All of the above

119
Which cellular process requires the presence of
oxygen?

1. photosynthesis
2. Anaerobic respiration
3. Aerobic respiration
4. All of the above

120
Lactic acid and alcohol are products of which
cellular process?

1. photosynthesis
2. fermentation
3. Aerobic respiration
4. DNA replication

121
Cell membranes allow

1. All substances to enter and leave a cell
2. Only gases to enter and leave a cell
3. Only water to enter and leave a cell
4. Some substances but not others to enter and leave
   the cell

122
Substances move into and out of a cell by

1. diffusion
2. osmosis
3. Active transport
4. All of the above

123
The movement of air freshener throughout a room
is an example of

1. condensation
2. diffusion
3. Active transport
4. evaporation

124
If a blood cell is placed in a liquid with a very
high salt concentration, water molecules will

1. Enter the cell
2. Leave the cell
3. Not cross the cell membrane
4. None of the above

125
If a blood cell is placed in a liquid with a very
high salt concentration, water molecules will

1. Enter the cell
2. Leave the cell
3. Not cross the cell membrane
4. None of the above

126
Gases and other small molecules enter and leave a
cell through which process?

1. osmosis
2. Active transport
3. engulfment
4. diffusion

127
Which of the following methods of transporting
materials across a cell membrane requires energy?

1. osmosis
2. Active transport
3. diffusion
4. All of the above

128
Large materials are brought into a cell by

1. Special proteins in the cell membrane
2. engulfment
3. A B
4. Neither A nor B

129
The theory of spontaneous generation was
disproved by several scientists including

1. Louis Pasteur
2. Gregor Mendel
3. Carolus Linnaeus
4. Aristotle

130
Penicillin, the first antibiotic that was widely
used to cure bacterial infections, was discovered
by

1. Louis Pasteur
2. Aristotle
3. Alexander Fleming
4. James Watson

131
Fungi often form relationships with other types
of organisms. These relationships often benefit
both organisms. This type of relationship is
called

1. predation
2. mutualism
3. convergence
4. Spore formation

132
Fungi often form relationships with other types
of organisms. These relationships often benefit
both organisms. This type of relationship is
called

1. predation
2. mutualism
3. convergence
4. commensalism

133
A parasite forms a relationship with another
organism called a host. This relationship is
helpful to

1. Both organisms
2. Only the host
3. Only the parasite
4. Neither the host nor the parasite

134
A lichen is an example of a fungus and either an
alga or a bacterium living together. This
relationship benefits

1. Both organisms
2. Only the fungus
3. Only the alga
4. Neither organism

135
The ability of an organism to maintain constant
internal conditions is called

1. homeostasis
2. evolution
3. adaptation
4. symbiosis

136
All of the following are adaptations for
maintaining a constant body temperature except

1. fur
2. Body fat
3. Light-weight hollow bones
4. Down feathers

137
Reptiles include all of the following except

1. snakes
2. lizards
3. turtles
4. toads

138
Which of the following structures is the most
efficient way of delivering oxygen to cells in a
multicellular organism?

1. An open circulatory system
2. A closed circulatory system with a 2 chambered
   heart
3. A closed circulatory system with a 3 chambered
   heart
4. A closed circulatory system with a 4 chambered
   heart

139
An ectothermic animal such as a desert lizard
controls its body temperature by

1. Regulating exposure to the sun
2. Basking in the sun altogether
3. Avoiding the sun altogether
4. Coming out only at night

140
Which of the following statements about mammals
is false?

1. All mammals give birth to live young
2. All mammals are endotherms
3. All mammals live on land
4. All mammals produce milk to nourish their young

141
Sexual reproduction in plants involves

1. Spore production
2. The production of pollen
3. The growth of buds
4. None of the above

142
Most behaviors help an animal

1. survive
2. reproduce
3. Both A and B
4. None of the above

143
Animals compete for

1. food
2. water
3. mates
4. All of the above

144
Many types of animals live in societies in which
all members work for the benefit of the group.
Societies are composed of

1. Closely related members of the same species
2. Members of the same species
3. Members of diverse species
4. Plants and animals from the same habitat

145
An ecosystem includes

1. The living things in a particular area
2. The nonliving resources found in a particular
   area
3. All of the living and nonliving things that
   interact in a particular area
4. None of the above

146
An organisms habitat refers to

1. The area where it lives
2. Its territory
3. The area where the organism finds food, water,
   shelter and other things it needs to survive.
4. All of the above

147
The smallest level of ecological organization is

1. The population
2. A community
3. An ecosystem
4. An individual member of a species

148
The size of any population tends to

1. Increase over time
2. Decrease over time
3. Remain the same
4. Be affected by many factors

149
Which of the following statements is false?

1. More than one species can share the same habitat
2. More than one species can share the same food
   source
3. More than one species can share the same niche
   within a habitat
4. More than one species can share the same
   territory within a habitat

150
Which organism would occupy the highest place in
a food web?

1. A producer
2. A decomposer
3. A primary consumer
4. A second or third level consumer

151
Which of the following is not a type of consumer?

1. A producer
2. A decomposer
3. An omnivore
4. An insectivore

152
Living things cannot use nitrogen in the form
found in the air. Which type of organisms
convert nitrogen into a form that other organisms
can use?

1. consumers
2. bacteria
3. producers
4. scavengers

153
A group of ecosystems with similar climates and
types of organisms is called a

1. continent
2. biome
3. hemisphere
4. community

154
The two primary factors that determine the types
of plants and, in turn, the types of animals
found in a given area are

1. Rainfall and temperature
2. Geography and temperature
3. Rainfall and type of soil
4. None of the above

155
Types of biomes include all of the following
except a

1. Deciduous forest
2. desert
3. tundra
4. Rotting log

156
All of the following are types of tissues in the
human body except

1. Nerve tissue
2. Connective tissue
3. Reproductive tissue
4. Muscle tissue

157
The function of a plant stem is to

1. Make food for the plant
2. Protect the plant
3. Absorb water
4. Transport materials between the roots and leaves

158
All of the following are parts of the nervous
system except

1. neurons
2. ovaries
3. The brain
4. The spinal cord

159
Which type of plant produces naked seeds?

1. A pear tree
2. A pine tree
3. A moss
4. A lichen

160
An organisms scientific name

1. Is unique
2. Refers to its genus and species
3. Is always Latin
4. All of the above

161
An organisms scientific name

1. Is unique
2. Refers to its genus and species
3. Is always Latin
4. All of the above

162
The system of classification of living things
that assigns a scientific name to all types of
organisms was developed by

1. Gregor Mendel
2. Louis Pasteur
3. Aristotle
4. Carolus Linnaeus

163
The functions of the skin include all of the
following except

1. Preventing the loss of water
2. Preventing infection
3. Eliminating wastes
4. Production of hormones

164
Materials in the cells enter the blood in the

1. veins
2. arteries
3. aorta
4. capillaries

165
The structure of DNA was studied by

1. James Watson
2. Francis Crick
3. Roseline Franklin
4. All of the above

166
The sections of DNA that contain information for
particular traits are called

1. genes
2. centromeres
3. chromatids
4. ribosomes

167
Different forms of the same genes are called

1. phenotypes
2. alleles
3. chromatids
4. purebreds

168
All of the following play a role in natural
selection except

1. Competition for limited resources
2. The production of very few offspring within a
   species
3. Variations between individuals in the same
   species
4. Inherited traits that help members of a species
   survive

169
All of the following are types of fossils except

1. Molds and casts
2. Metamorphic rock
3. Preserved remains
4. Petrified fossils

170
All of the following factors can limit the growth
of a population except

1. Unlimited resources
2. diseases
3. predation
4. Natural disasters

171
Survival of the fittest best describes the
theories of which scientist?

1. Gregor Mendel
2. James Watson
3. Jonas Salk
4. Charles Darwin

172
Which of the following follows mitosis?

1. Cell respiration
2. Cell division
3. DNA replication
4. fertilization

173
Which of the following occurs before mitosis?

1. The DNA is copied
2. The cell grows to its mature size
3. The number of cell organelles increases
4. All of the above

174
During mitosis a cell with 16 chromosomes produces

1. 2 daughter cells with 16 chromosomes each
2. 4 daughter cells with 8 chromosomes each
3. 4 eggs or sperm cells with 8 chromosomes each
4. None of the above

175
Meiosis includes

1. DNA replication
2. Production of sex cells with half the original
   number of chromosomes
3. Two cell divisions
4. all of the above