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POB FINAL PRACTICE TEST 2026 ALL QUESTIONS AND
CORRECT DETAILED ANSWERS | ALREADY A GRADED |
NEW AND REVISED
1. Two populations of cricket frogs (Acris blanchardi) live in wetlands in
Arkansas. In one population, males produce a high-pitched mating call.
In the other, males produce a low-pitched mating call. Adult females
presented with calling males from both populations nearly always choose
to mate with
males from their own population. You collect egg masses from each
population and switch them, rearing female tadpoles from the high-pitched
population so that they metamorphose into frogs among adults from the low-
pitched population and vice versa. When the frogs mature, you observe that
individ- uals hatched from low-pitched eggs but raised among high-pitched
adults consistently choose to mate with high-pitched males instead of low-
pitched males.: Choice of mate call in these frogs is strongly attected by learning.
2. A small marine amphipod has recently been discovered that carries another
bad tasting organism on its back against its normal behavior. The
"backpack" organism tastes bad. If a fish ingests the pair, it immediately
spits them back out. If the amphipod is alone, however, the amphipod is
readily eaten and swallowed. There is no apparent benefit in this relationship
for the "backpack" organism which appears to be neither helped nor
harmed. This is therefore a case of: Commensalism.
3. Most natural food chains are only four or five links long, rarely more. The
number of trophic levels is limited because: the eflciency in utilizing the food eaten at each level
is very low, about 10 percent.
4. A form of symbiosis in which one participant benefits and the other
appar- ently is not benefited nor harmed is: Commensalism.
5. Interaction between two species as both attempt to use the same environ-
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mental resources, they have overlapping niches, is: Competition.
6. Learned behavior that causes a family of baby ducks to follow their
mother is called: Imprinting.
7. In dehydration synthesis .: One monomer loses a hydrogen atom, and the other loses a
hydroxyl group, forming water.
8. Isotopes of a given element have: The same number of protons but ditter in the number of neutrons.
9. Match the characteristic of life with the proper example of that
characteristic. Use each term only once.: 1. A single cell divides many times to become a
plant.œGrowth and Development
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2. After dissecting many mice, an anatomist finds that they all have a four-chambered heart and the chambers are
always in the same arrangement.œ Organization
3. A single-celled amoeba wraps around a bacterial cell and digests it.œA cquire Materials and Energy
4. The grey tree frog has colors and textures of its skin making it look much like tree bark and diflcult to see when still
on a tree.œ
Adaptation through Evolution
5. A mosquito sensing heat flies toward the heat source.œ Response to Stimulus
6. When sodium levels get too high in the blood, an animal drinks more water to dilute the concentration out.œ
Homeostasis
10. A phospholipid is composed of: One glycerol molecule linked to one phosphate group and two fatty
acids.
11. Consider the life of the bear. Th female has one or two offspring nd puts in
a a great deal of parental care. Most of the offspring live to be oldfore dying.
be What type of survivorship curve does this represent?: Type 1
12. In water, a weak hydrogen bond occurs between hydrogen in one molecule
and: An oxygen atom in a ditterent molecule.
13. The outbreak of a disease, such as the bubonic plague, that kills
large numbers of people in a city is an example of: Density dependent factor.
14. Nucleic acids, like DNA, are polymers of: Nucleotides
15. Which of the following is a biotic factor in an ecosystem?: Food chain.
16. Population growth rate would be negative when: Death rate is greater than birth rate.
17. Fatty acids with double bonds between some of their carbons are said to
be: Unsaturated.
18. Which of the following is a strength of Science?: 1. Science is antiauthoritarian.
2. Science is publicly understandable.
3. Science is self-correcting since new data and new technologies may require new or altered theories. This constant
testing make science durable
4. The predictions of science are measurable and can be tested.
POB FINAL PRACTICE TEST 2026 ALL QUESTIONS AND
CORRECT DETAILED ANSWERS | ALREADY A GRADED |
NEW AND REVISED
1. Two populations of cricket frogs (Acris blanchardi) live in wetlands in
Arkansas. In one population, males produce a high-pitched mating call.
In the other, males produce a low-pitched mating call. Adult females
presented with calling males from both populations nearly always choose
to mate with
males from their own population. You collect egg masses from each
population and switch them, rearing female tadpoles from the high-pitched
population so that they metamorphose into frogs among adults from the low-
pitched population and vice versa. When the frogs mature, you observe that
individ- uals hatched from low-pitched eggs but raised among high-pitched
adults consistently choose to mate with high-pitched males instead of low-
pitched males.: Choice of mate call in these frogs is strongly attected by learning.
2. A small marine amphipod has recently been discovered that carries another
bad tasting organism on its back against its normal behavior. The
"backpack" organism tastes bad. If a fish ingests the pair, it immediately
spits them back out. If the amphipod is alone, however, the amphipod is
readily eaten and swallowed. There is no apparent benefit in this relationship
for the "backpack" organism which appears to be neither helped nor
harmed. This is therefore a case of: Commensalism.
3. Most natural food chains are only four or five links long, rarely more. The
number of trophic levels is limited because: the eflciency in utilizing the food eaten at each level
is very low, about 10 percent.
4. A form of symbiosis in which one participant benefits and the other
appar- ently is not benefited nor harmed is: Commensalism.
5. Interaction between two species as both attempt to use the same environ-
,2|Page
mental resources, they have overlapping niches, is: Competition.
6. Learned behavior that causes a family of baby ducks to follow their
mother is called: Imprinting.
7. In dehydration synthesis .: One monomer loses a hydrogen atom, and the other loses a
hydroxyl group, forming water.
8. Isotopes of a given element have: The same number of protons but ditter in the number of neutrons.
9. Match the characteristic of life with the proper example of that
characteristic. Use each term only once.: 1. A single cell divides many times to become a
plant.œGrowth and Development
,3|Page
2. After dissecting many mice, an anatomist finds that they all have a four-chambered heart and the chambers are
always in the same arrangement.œ Organization
3. A single-celled amoeba wraps around a bacterial cell and digests it.œA cquire Materials and Energy
4. The grey tree frog has colors and textures of its skin making it look much like tree bark and diflcult to see when still
on a tree.œ
Adaptation through Evolution
5. A mosquito sensing heat flies toward the heat source.œ Response to Stimulus
6. When sodium levels get too high in the blood, an animal drinks more water to dilute the concentration out.œ
Homeostasis
10. A phospholipid is composed of: One glycerol molecule linked to one phosphate group and two fatty
acids.
11. Consider the life of the bear. Th female has one or two offspring nd puts in
a a great deal of parental care. Most of the offspring live to be oldfore dying.
be What type of survivorship curve does this represent?: Type 1
12. In water, a weak hydrogen bond occurs between hydrogen in one molecule
and: An oxygen atom in a ditterent molecule.
13. The outbreak of a disease, such as the bubonic plague, that kills
large numbers of people in a city is an example of: Density dependent factor.
14. Nucleic acids, like DNA, are polymers of: Nucleotides
15. Which of the following is a biotic factor in an ecosystem?: Food chain.
16. Population growth rate would be negative when: Death rate is greater than birth rate.
17. Fatty acids with double bonds between some of their carbons are said to
be: Unsaturated.
18. Which of the following is a strength of Science?: 1. Science is antiauthoritarian.
2. Science is publicly understandable.
3. Science is self-correcting since new data and new technologies may require new or altered theories. This constant
testing make science durable
4. The predictions of science are measurable and can be tested.
