Biology Praxis FORM 1
The material appears to reproduce on its own. - ✅✅ -Which of the
following characteristics of a material found on the bark of a tree will most
likely prove that the material is a living thing?
3' U A C G G G A G U 5' - ✅✅ -Given the DNA sequence 5' ATGCCCTCA
3', which of the following is the correct complementary sequence of
messenger RNA?
✅✅
A woman who lives to be 80 years old, has 6 children and 30
grandchildren, and is in poor health most of her life - -According to
evolutionary theory, which of the following individuals has the greatest
Darwinian fitness?
✅✅
The wolf population will initially increase because of an increase in the
wolves' food availability. - -When caribou migrate, the weaker ones
often become the prey of wolves and other carnivores. If the vegetation that
the caribou eat is sparse for several consecutive years, which of the
following will most likely be true about the wolf population during that same
period?
Evolutionary adaptations arise by natural selection.
✅✅
The number of species in an isolated island-like habitat is determined by an
equilibrium between the rates of immigration and extinction. - -Which
TWO of the following are scientific theories?
AbC - ✅✅ -A diploid organism has the genotype AaBbCc for three loci,
each of which is located on a different chromosome. A normal gamete
produced by this organism could have which of the following genotypes?
✅✅
The action potential will not occur, because depolarization will not occur. -
-The sciatic nerve from a frog was isolated and placed into a nerve
chamber. A recording of an action potential was measured when the nerve
was bathed in a solution that mimics the extracellular fluid typically
surrounding a cell, and the nerve was stimulated. The recording is shown
above. If the toxin TTX, a potent sodium-channel blocker, is added to the
bathing solution and the nerve is stimulated using a stimulus of the same
strength, what will be the most likely change in the action potential?
✅✅
Without sea stars, the sea urchin and mussel populations will increase and
eliminate other species in the ecosystem. - -Sea star wasting
syndrome is decimating some populations of sea stars along the North
American Pacific coast. Sea stars are the only natural predator of sea
urchins and mussels in some portions of this ecosystem. Which of the
following is most likely a concern of scientists studying the ecosystem?
, The water cycle differs from other biogeochemical cycles because most
✅✅
water moves through ecosystems by physical rather than chemical
processes. - -Which of the following statements regarding the water
cycle is correct?
homologous structures - ✅✅ -The skeletal structures of the human arm
and whale flipper (pectoral fin) are shown above. The arm and flipper are
examples of
✅✅
An RNA polymerase associates with transcription factors bound to the
gene's regulatory sequences. - -Which of the following is required to
initiate transcription of a particular gene in eukaryotic cells?
Meristem - ✅✅ -In a plant, undifferentiated cells that can divide throughout
the life of the plant to enable growth are found in which of the following?
✅✅
Antibody production by the rabbit in response to Substance P will increase
over a two-week period. - -Investigators have immunized a rabbit with
Substance P. They are studying the effect of the immunization on
production of anti-Substance P antibodies over a two-week period following
the immunization. Which of the following is the best hypothesis for the
experiment?
Increasing the light intensity -✅✅ -Experiments were conducted to test
the rate of transpiration in plants under different environmental conditions.
The stem of a plant was cut. Tubing, attached at one end to a water-filled
pipet, was placed over the cut end of the shoot. The tubing and pipet were
clamped as shown in the diagram above. Measurements of the water level
in the pipet were recorded every 15 minutes. The experimental setup was
placed in a room with partial sunlight at 25ºC. Which of the following
conditions would cause the most rapid lowering of the water level in the
pipet?
Aphids deplete the sugars normally available for the plant. - ✅✅ -Aphids
are small insects that rest on the stems and leaves of plants and insert their
needlelike mouthpiece directly into the phloem of the plants. Which of the
following is the primary reason that an aphid infestation will kill a plant?
polygenic - ✅✅ -Skin color in humans appears to show a continuous
distribution. In an examination of pedigrees, no recognizable pattern of
Mendelian inheritance is found with respect to skin color. The data suggest
that inheritance of skin color in humans is
Generating electricity without burning fossil fuels - ✅✅-Wind turbines are
used for which of the following activities?
The material appears to reproduce on its own. - ✅✅ -Which of the
following characteristics of a material found on the bark of a tree will most
likely prove that the material is a living thing?
3' U A C G G G A G U 5' - ✅✅ -Given the DNA sequence 5' ATGCCCTCA
3', which of the following is the correct complementary sequence of
messenger RNA?
✅✅
A woman who lives to be 80 years old, has 6 children and 30
grandchildren, and is in poor health most of her life - -According to
evolutionary theory, which of the following individuals has the greatest
Darwinian fitness?
✅✅
The wolf population will initially increase because of an increase in the
wolves' food availability. - -When caribou migrate, the weaker ones
often become the prey of wolves and other carnivores. If the vegetation that
the caribou eat is sparse for several consecutive years, which of the
following will most likely be true about the wolf population during that same
period?
Evolutionary adaptations arise by natural selection.
✅✅
The number of species in an isolated island-like habitat is determined by an
equilibrium between the rates of immigration and extinction. - -Which
TWO of the following are scientific theories?
AbC - ✅✅ -A diploid organism has the genotype AaBbCc for three loci,
each of which is located on a different chromosome. A normal gamete
produced by this organism could have which of the following genotypes?
✅✅
The action potential will not occur, because depolarization will not occur. -
-The sciatic nerve from a frog was isolated and placed into a nerve
chamber. A recording of an action potential was measured when the nerve
was bathed in a solution that mimics the extracellular fluid typically
surrounding a cell, and the nerve was stimulated. The recording is shown
above. If the toxin TTX, a potent sodium-channel blocker, is added to the
bathing solution and the nerve is stimulated using a stimulus of the same
strength, what will be the most likely change in the action potential?
✅✅
Without sea stars, the sea urchin and mussel populations will increase and
eliminate other species in the ecosystem. - -Sea star wasting
syndrome is decimating some populations of sea stars along the North
American Pacific coast. Sea stars are the only natural predator of sea
urchins and mussels in some portions of this ecosystem. Which of the
following is most likely a concern of scientists studying the ecosystem?
, The water cycle differs from other biogeochemical cycles because most
✅✅
water moves through ecosystems by physical rather than chemical
processes. - -Which of the following statements regarding the water
cycle is correct?
homologous structures - ✅✅ -The skeletal structures of the human arm
and whale flipper (pectoral fin) are shown above. The arm and flipper are
examples of
✅✅
An RNA polymerase associates with transcription factors bound to the
gene's regulatory sequences. - -Which of the following is required to
initiate transcription of a particular gene in eukaryotic cells?
Meristem - ✅✅ -In a plant, undifferentiated cells that can divide throughout
the life of the plant to enable growth are found in which of the following?
✅✅
Antibody production by the rabbit in response to Substance P will increase
over a two-week period. - -Investigators have immunized a rabbit with
Substance P. They are studying the effect of the immunization on
production of anti-Substance P antibodies over a two-week period following
the immunization. Which of the following is the best hypothesis for the
experiment?
Increasing the light intensity -✅✅ -Experiments were conducted to test
the rate of transpiration in plants under different environmental conditions.
The stem of a plant was cut. Tubing, attached at one end to a water-filled
pipet, was placed over the cut end of the shoot. The tubing and pipet were
clamped as shown in the diagram above. Measurements of the water level
in the pipet were recorded every 15 minutes. The experimental setup was
placed in a room with partial sunlight at 25ºC. Which of the following
conditions would cause the most rapid lowering of the water level in the
pipet?
Aphids deplete the sugars normally available for the plant. - ✅✅ -Aphids
are small insects that rest on the stems and leaves of plants and insert their
needlelike mouthpiece directly into the phloem of the plants. Which of the
following is the primary reason that an aphid infestation will kill a plant?
polygenic - ✅✅ -Skin color in humans appears to show a continuous
distribution. In an examination of pedigrees, no recognizable pattern of
Mendelian inheritance is found with respect to skin color. The data suggest
that inheritance of skin color in humans is
Generating electricity without burning fossil fuels - ✅✅-Wind turbines are
used for which of the following activities?
