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WorksheetsSemester 2 Final Review
Total questions: 60
Worksheet time: 30mins
Which of the following organisms is considered an autotroph/producer?
lion
caterpillar
grass
bunny
Which of the following is an abiotic factor in an ecosystem?
soil
trees
birds
humans
Which of the following is a biotic factor in an ecosystem?
soil
temperature
water
plants
In ecology, a population is defined as all the
members of a single species in the biosphere.
members of a single species inhabiting a given area.
abiotic and biotic factors in a given location.
members of different species inhabiting a given area.
The amount of energy lost as heat in an ecosystem as you go from one trophic level to another is...
1%
10%
100%
0.1%
The letters in the diagram represent the processes involved in the water cycle. Which letter represents the process of transpiration?
A
B
C
D
The letters in the diagram represent the processes involved in the water cycle. Which letter represents the process of precipitation?
A
B
C
D
The numbers on the diagram represent the processes involved in the carbon cycle. Which number represents the process of photosynthesis?
1
2
5
6
The numbers on the diagram represent the processes involved in the carbon cycle. Which number represents the process of cellular respiration?
1
4
5
6
Which type of ecological succession does the diagram show?
primary succession
pioneer succession
secondary succession
climax succession
Primary succession starts with ....
bare rock
soil
shrubs
small plants
Which of the following is considered to be a pioneer species in primary succession?
small plants
moss and lichen
large trees
soil
Which of the following would be considered a community?
a worker bee
a hive of bees
bees, birds, wildflowers, trees
rocks, soil, bees, birds, trees, pond
The area in which an organism lives is its...
niche
habitat
population
community
The role or the way an organism lives in its environment is known as its...
niche
habitat
population
community
The movement of individuals out of an area is called ________.
birth rate
death rate
immigration
emigration
The movement of individuals into an area is called ________.
birth rate
death rate
immigration
emigration
Which two factors can cause a population to grow?
birth rate and immigration
death rate and emigration
birth rate and emigration
death rate and immigration
Genetic drift is
the movement of organisms between populations.
changes in allele frequency caused by random events.
physical isolation of a population by geography.
immigration and emigration among populations.
Which of the following is considered a decomposer in an ecosystem?
plants
soil
bacteria
a hawk
The bar graph shows the relative biomass of four different populations of a particular food pyramid. Which of the following most likely represents the producers/autotrophs in this ecosystem?
Population A
Population B
Population C
Population D
In a marine ecosystem, algae are able to use sunlight and inorganic materials to make their own food. Clams feed on the algae by filtering them out of the water. In this ecosystem, the clams act as
carnivores
primary consumers
producers
secondary consumers
The diagram shows a food chain. Based on the food chain shown the fish can be classified as
a producer.
a primary consumer.
a secondary consumer.
a tertiary consumer.
Based on the diagram of a biomass pyramid, which statement best explains why the total biomass of snakes is less than that of the other members of the ecosystem?
The greatest amount of available energy is found at the top level of the pyramid.
There is a decrease in available energy at each higher trophic level of the pyramid.
The total energy of the producers is less than the total energy of the consumers.
There is more energy available at the consumer level than at the producer level.
The diagram shows a food chain. Based on the food chain which of the organisms would be considered a producer/autotroph?
phytoplankton
krill
fish
killer whale
A heterozygous organism has
three different alleles for a trait.
two identical alleles for a trait.
only one allele for a trait.
two different alleles for a trait.
A DNA molecule is a polymer composed of subunits known as
nucleotides.
amino acids.
sugars.
uracil molecules.
An organism's expressed traits, such as hair color or shape, are called its
phenotype
genotype
allele
gametes
The appearance of a recessive trait in offspring of animals most probably indicates that
one parent was homozygous dominant and the other parent was hybrid for that trait.
neither parent carried a recessive gene for that trait.
both parents carried at least one recessive gene for that trait.
one parent was homozygous dominant and the other parent was homozygous recessive for that trait.
Which pair of molecules, when bonded together, would most likely be found in a nucleotide of DNA?
deoxyribose and uracil.
ribose and thymine.
ribose and adenine.
deoxyribose and guanine.
In a population of dogs, curly hair is dominant over straight hair. If two parents are heterozygous for this trait what is the probability that any of their offspring will have straight hair?
50%
0%
25%
100%
From the 20 common amino acids, organisms build thousands of different proteins. This is because the
each amino acid will have different properties.
chemical make-up amino acids can change in different molecules.
amino acids have numerous forms.
sequence and number of amino acids vary.
What is the site of protein synthesis in cells?
chromosomes
ribosomes
nuclei
vacuoles
Unlike DNA, RNA contains
adenine
uracil
phosphate groups
thymine
A mutation has occurred and a chunk of DNA has been lost, as shown below. When repaired by an enzyme what would be the replacement?
C A T C C G A A T
G T A _ _ _ T T A
CCG
TTA
GCC
GGC
Which type of RNA functions as a blueprint for the genetic code (DNA)?
RNA Polymerase
mRNA
tRNA
rRNA
Which type of RNA molecule carries amino acids?
mRNA
tRNA
rRNA
RNA Polymerase
Mutations can be transmitted to the next generation only if they are present in
brain cells
muscle cells
body cells
sex cells
Which of the following represents a genetically normal male's chromosomes?
XXY
XY
XX
YY
Which genotype is heterozygous?
Bb
bb
cc
AA
In eukaryotes, DNA
is located in the nucleus.
floats freely in the cytoplasm.
is located in the ribosome.
is circular.
A pedigree can be used to
determine whether a trait is inherited.
show how a trait is passed from one generation to the next.
determine whether an allele is dominant or recessive.
all of the above
A person who is a carrier for a trait is said to
be homozygous for the trait
be heterozygous
have the trait
all of the above
The correct order of molecules involved in protein synthesis is
messenger RNA, transfer RNA, DNA, protein
DNA, messenger RNA, transfer RNA, protein
protein, transfer RNA, DNA, messenger RNA
DNA, messenger RNA, protein, transfer RNA
The remains or impressions of organisms preserved in petrified form or as a mold or cast in rocks are called . . .
footprints.
cells.
radioactive isotopes.
fossils.
Which of the following is a method for determining which rocks or events are older or younger in relation to other objects or events?
Absolute Dating
Relative Dating
Absolute Sequencing
Relative Sequencing
Any variation that can help an organism survive in its environment is called a(n) ______.
characteristic
mutation
gene
adaptation
Earth’s most recent era is the ____.
Precambrian Time
Mesozoic Era
Cenozoic Era
Paleozoic Era
The time needed for half of a sample of a radioactive element to decay is called its
Relative age.
half-life
absolute age
isotope age
Evolution can best be described as
a process of change through time.
a process of growth in an organism.
the change in size of body structures through use and disuse.
the formation of fossils.
A population of finches that have three different beaks live on an island. Each beak type is adapted to one of three specific food sources. Two of the three food sources are eliminated during a drought. What will happen first to this finch population?
The finch population that is best adapted to the remaining food source will survive.
The food sources will adapt to the finches.
All three finch populations will die.
Only two of the finch populations will adapt to the remaining food source.
Which is the best example of natural selection?
Organisms with beneficial genetic variations tend to survive and reproduce.
The environment changes and the organisms migrate to a more favorable environment.
Organisms of one species cooperate to force other species to migrate or become extinct.
Organisms of one species cooperate to force other species to migrate or become extinct.
Genetic drift is …
physical isolation of a population by geography.
the movement of organisms between populations.
changes in allele frequency caused by random events.
immigration and emigration among populations.
Mutations within a cell’s DNA are
naturally occurring and because they are harmful, they will limit genetic variation.
unnatural and are always harmful.
naturally occurring and produce genetic variation.
common and always change phenotypes.
A change in DNA sequence that can lead to genetic variation is called a
mutation
nucleotide
mistake
frameshift
Which of the following mutations cause a frameshift?
deletion and substitution
substitution and insertion
silent mutation
insertion and deletion
Which type of mutation does not change the amino acid sequence of a protein?
deletion
insertion
silent
substitution
According to Darwin's theory of natural selection, the individuals that tend to survive are those that have
the fewest number of offspring.
variations best suited for their environment.
characteristics their parents acquire by use and disuse.
characteristics that plant and animal breeders value.
Which of the following is NOT a mechanism of natural evolutionary change?
Genetic drift
Natural Selection
Mutations
Artificial selection
Scientists use radiometric dating (radioactive decay) to measure
time of day.
half-life.
relative age.
absolute age.
