UMAINE BIO 100 EXAM 1,2,3,4
QUESTIONS AND ANSWERS
e. All of the above apply - Correct Answers -Carrying Capacity...
a. Can be changed by increasing the area available
b. Can increase if new resources are available
c. can decrease if resources are lost
d. Is dependent on the species in question
e. All of the above apply
c. Density- dependent factors lead to fewer births and increased mortality - Correct
Answers -Why do populations grow more slowly as they approach their carrying
capacity?
a. Horomonal changed promotw higher death rates in crowded populations
b. Fewer births and increased mortality occur because density- independent factors
happening more often
c. Density- dependent factors lead to fewer births and increased mortality
d. Individuals voluntarily stop mating so that overcrowding does not occur
e. The incoming energy is spread out over a larger area so that the population can
experience a higher rate of growth
c. Pioneer species - Correct Answers -Lichens are able to colonize bare rock. Their
inputs enrich the soil and allow the establishment of a stable community. Lichens are
therefore considered....
a. Primary succession
b. Secondary succession
c. Pioneer species
d. Climax species
d. All of the above are correct - Correct Answers -When two amino acids are joined
together...
a. A dehydration reaction much have occured
b. A peptide bond has formed
c. Polymerization occured
d. All the above are correct
e. None of the above are correct
b. 4 and 7 - Correct Answers -In figure 3. images ___ and ___ are likely optical
isomers?
,a. 2 and 3
b. 4 and 7
c. 6 and 8
d. 5 and 9
b. Ribosomes polymerizing amino acids into polypeptides - Correct Answers -Which of
the following is not part of DNA replication?
a. Okazaki fragments on the lagging strand
b. Ribosomes polymerizing amino acids into polypeptides
c. Ligase joining together sections of newly made DNA
d. DNA polymerase 3 proofreading to correct errors
e. One of 4 different nucleotides is added to the 3' end of the growing DNA strand,
releasing 2 phosphates
b. In short segments in a direction away from the replication fork - Correct Answers -The
lagging strand is the strand synthesized...
a. In the same direction in which the replication fork is moving
b. In short segments in a direction away from the replication fork
c. In the nucleus
d. In the cytoplasm
e. Second, after the template strand is made
a. An RNA molecule is synthesized - Correct Answers -During the process of
transcription in both prokaryotic and eukaryotic cells...
a. An RNA molecule is synthesized
b. mRNA attaches to ribosomes
c. RNA leaves the nucleus through the nuclear pores
d. RNA transcripts eneter the cytoplasm via the endoplasmic reticulum
e. Deoxyribonucelotides are plymerized into RNA
c. C18H36O2 - Correct Answers -In figure 3, the molecular formula of molecule 6 is...
a. C9H1O2
b. C18H1O2
c. C18H36O2
d. H1O2
e. 8 - Correct Answers -In figure 3, which image shows a molecule in the cis
configuration
a. 1
b. 2
c. 4
d. 6
e. 8
e. At each step, energy is lost from the system because of laws of thermodynamics -
Correct Answers -For most terrestrial ecosystems, pyramids composed of species
, abundances, biomass, and energy are similar in that they have a broad base and a
narrow top. The primary reason for this pattern is that ...
a. As matter oasses through the ecosystems, some of it is lost to the enviroment
b. Top carnivores and teritary consumers have a more general diet than primary
producers
c. Secondary consumers and top carnivores require less energy than producers
d. Biomagnification of toxic materials limits the secondary consumers and top
carnivores
e. At each step, energy is lost from the system because of laws of thermodynamics
b. Tertiary consumer level - Correct Answers -Which trophic level is most vulnerable to
going extinct
a. Decomposer level
b. Tertiary consumer level
c. Secondary consumer level
d. Primary consumer level
e. Producer level
a. Acidic - Correct Answers -Atmospheric CO2 results in rain that is...
a. Acidic
b. Basic
c. Neutral
d. Atmospheric CO2 has no effect on the pH of rain
b. A few elephants can modify and impact a very large areas this effecting the structure
of the larger community - Correct Answers -Elephants have a major influence on
community structure. The african grasslands contain scattered woody plants, but they
are kept in check by the constant uprooting activities of the elephants. Take away the
elephants, and the grasslands change back to forests. The newly growing forests
support fewer species than the previous grasslands. Which of the following best
describes why elephants are the keystone species in this setting?
a. Grazing animals depend upon huge numbers of elephants to convert forests to
grassland
b. A few elephants can modify and impact a very large areas this effecting the structure
of the larger community
c. Elephants are the largest and most abundant herbivore in this community
d. Elephants prevent drought in African grasslands by causing water to percolate to the
surfcae as they pound the ground
e. There are usually many more elephants than other herbivores and therefore help
other populations survive by keeping out many of the large African predators
d. Surroundings/sunlight/photosynthesis - Correct Answers -Both matter and energy are
requires by all living organisms. Matter can be aquired from ___ but energy must be
orginally captures from ___ via ___
a. Primary producers/carbon dioxide/cellular respiration
b. Outer space/cellular respiration/sunlight
QUESTIONS AND ANSWERS
e. All of the above apply - Correct Answers -Carrying Capacity...
a. Can be changed by increasing the area available
b. Can increase if new resources are available
c. can decrease if resources are lost
d. Is dependent on the species in question
e. All of the above apply
c. Density- dependent factors lead to fewer births and increased mortality - Correct
Answers -Why do populations grow more slowly as they approach their carrying
capacity?
a. Horomonal changed promotw higher death rates in crowded populations
b. Fewer births and increased mortality occur because density- independent factors
happening more often
c. Density- dependent factors lead to fewer births and increased mortality
d. Individuals voluntarily stop mating so that overcrowding does not occur
e. The incoming energy is spread out over a larger area so that the population can
experience a higher rate of growth
c. Pioneer species - Correct Answers -Lichens are able to colonize bare rock. Their
inputs enrich the soil and allow the establishment of a stable community. Lichens are
therefore considered....
a. Primary succession
b. Secondary succession
c. Pioneer species
d. Climax species
d. All of the above are correct - Correct Answers -When two amino acids are joined
together...
a. A dehydration reaction much have occured
b. A peptide bond has formed
c. Polymerization occured
d. All the above are correct
e. None of the above are correct
b. 4 and 7 - Correct Answers -In figure 3. images ___ and ___ are likely optical
isomers?
,a. 2 and 3
b. 4 and 7
c. 6 and 8
d. 5 and 9
b. Ribosomes polymerizing amino acids into polypeptides - Correct Answers -Which of
the following is not part of DNA replication?
a. Okazaki fragments on the lagging strand
b. Ribosomes polymerizing amino acids into polypeptides
c. Ligase joining together sections of newly made DNA
d. DNA polymerase 3 proofreading to correct errors
e. One of 4 different nucleotides is added to the 3' end of the growing DNA strand,
releasing 2 phosphates
b. In short segments in a direction away from the replication fork - Correct Answers -The
lagging strand is the strand synthesized...
a. In the same direction in which the replication fork is moving
b. In short segments in a direction away from the replication fork
c. In the nucleus
d. In the cytoplasm
e. Second, after the template strand is made
a. An RNA molecule is synthesized - Correct Answers -During the process of
transcription in both prokaryotic and eukaryotic cells...
a. An RNA molecule is synthesized
b. mRNA attaches to ribosomes
c. RNA leaves the nucleus through the nuclear pores
d. RNA transcripts eneter the cytoplasm via the endoplasmic reticulum
e. Deoxyribonucelotides are plymerized into RNA
c. C18H36O2 - Correct Answers -In figure 3, the molecular formula of molecule 6 is...
a. C9H1O2
b. C18H1O2
c. C18H36O2
d. H1O2
e. 8 - Correct Answers -In figure 3, which image shows a molecule in the cis
configuration
a. 1
b. 2
c. 4
d. 6
e. 8
e. At each step, energy is lost from the system because of laws of thermodynamics -
Correct Answers -For most terrestrial ecosystems, pyramids composed of species
, abundances, biomass, and energy are similar in that they have a broad base and a
narrow top. The primary reason for this pattern is that ...
a. As matter oasses through the ecosystems, some of it is lost to the enviroment
b. Top carnivores and teritary consumers have a more general diet than primary
producers
c. Secondary consumers and top carnivores require less energy than producers
d. Biomagnification of toxic materials limits the secondary consumers and top
carnivores
e. At each step, energy is lost from the system because of laws of thermodynamics
b. Tertiary consumer level - Correct Answers -Which trophic level is most vulnerable to
going extinct
a. Decomposer level
b. Tertiary consumer level
c. Secondary consumer level
d. Primary consumer level
e. Producer level
a. Acidic - Correct Answers -Atmospheric CO2 results in rain that is...
a. Acidic
b. Basic
c. Neutral
d. Atmospheric CO2 has no effect on the pH of rain
b. A few elephants can modify and impact a very large areas this effecting the structure
of the larger community - Correct Answers -Elephants have a major influence on
community structure. The african grasslands contain scattered woody plants, but they
are kept in check by the constant uprooting activities of the elephants. Take away the
elephants, and the grasslands change back to forests. The newly growing forests
support fewer species than the previous grasslands. Which of the following best
describes why elephants are the keystone species in this setting?
a. Grazing animals depend upon huge numbers of elephants to convert forests to
grassland
b. A few elephants can modify and impact a very large areas this effecting the structure
of the larger community
c. Elephants are the largest and most abundant herbivore in this community
d. Elephants prevent drought in African grasslands by causing water to percolate to the
surfcae as they pound the ground
e. There are usually many more elephants than other herbivores and therefore help
other populations survive by keeping out many of the large African predators
d. Surroundings/sunlight/photosynthesis - Correct Answers -Both matter and energy are
requires by all living organisms. Matter can be aquired from ___ but energy must be
orginally captures from ___ via ___
a. Primary producers/carbon dioxide/cellular respiration
b. Outer space/cellular respiration/sunlight
