2019 STAAR Biology

Last updated about 4 years ago

50 questions

B.C.2G

B.C.7E

B.C.10C

B.C.2G

B.C.6A

B.C.12D

B.C.10A

B.C.2H

B.C.4A

B.C.2H

B.C.8B

B.C.3E

B.C.6C

B.C.3D

B.C.5A

B.C.2E

B.C.8C

B.C.12E

B.C.2G

B.C.7B

B.C.2H

B.C.4C

B.C.9C

B.C.2H

B.C.4B

B.C.7E

B.C.2.f

B.C.6F

B.C.10B

B.C.2H

B.C.4B

B.C.12C

B.C.2H

B.C.12C

B.C.2H

B.C.3D

B.C.7F

B.C.3D

B.C.6D

B.C.11B

B.C.10A

B.C.2H

B.C.2G

B.C.6F

B.C.5C

B.C.2G

B.C.6E

B.C.3D

B.C.8B

B.C.3B

B.C.4B

B.C.3F

B.C.4C

B.C.12A

B.C.7C

B.C.11B

B.C.3D

B.C.10B

B.C.2G

B.C.3D

B.C.6E

B.C.6B

B.C.10A

B.C.2H

B.C.11A

B.C.2G

B.C.9A

B.C.6G

B.C.2G

B.C.7D

B.C.6A

B.C.12A

B.C.9B

B.C.2G

B.C.5A

B.C.2H

B.C.7A

B.C.12B

B.C.3A

B.C.5B

B.C.9A

2019 STAAR Biology

2019 STAAR Biology

A new predator of rabbits has been introduced within an ecosystem. This new predator runs faster than the native predators of rabbits.

Which statement describes what will most likely occur in the rabbit population due to the introduction of the predator?

Which answer choice best describes a community?

Eight components present in nucleic acids are listed in the box.

Which components bond with adenine in a section of double-stranded DNA?

What would be the most likely effect of a wildfire that burned a large area of a forest?

Which four body systems interact to allow a person to sneeze?

Students use a microscope to look for structures present in four different cells. The students placed an X for each structure that was viewed for each cell on the table shown.

Which cell that was viewed is most likely a prokaryote?

A dichotomous key for identifying fish is shown.

Based on this key, which two fish have eyes located on either side of their head and are not spotted?

Students are modeling mRNA during the process of protein synthesis. Which answer choice correctly describes the model of the mRNA strand being transcribed?

A team of students encounters an unknown organism in a field while conducting a biodiversity study. Some students think the organism is a plant, while others think it is a fungus.

Which question should the students investigate to classify the organism correctly?

The San Marcos salamander, Eurycea nana, is a light reddish-brown translucent salamander about 2–5 cm in length. E. nana is found only in Spring Lake and a portion of the San Marcos River.

Which human activity would most likely decrease the ability of the salamanders to survive?

The diagram shows data on the evolution of horses.

The data in the diagram is evidence that —

A student produces a labeled drawing of a virus for a presentation. The student states that the capsid has a function similar to the nuclear membrane found in animal cells.

Which of these describes the similar functions of capsids and nuclear membranes?

Enzymes are proteins that have a three-dimensional shape that is specific to a particular substrate. Environmental conditions can change the shape of the protein.

What is the most likely result if the shape of the enzyme changes?

A type of cellular transport is shown.

Which description best identifies this type of cellular transport?

Gibberellins are hormones produced in the root tips of plants. The plant uses these hormones to stimulate the growth of shoots.

How are gibberellins able to affect other parts of the plant?

The diagram shows molecules that a mitochondrion uses and produces during a cellular process.

Which other molecule is a product of this process?

A partial Texas food web is shown

The populations of which organisms will most likely increase as a result of a disease that suddenly reduced the population of Texas horned lizards?

A biomass pyramid of an ecosystem is shown.

Which statement provides the best explanation for the difference in biomass of organisms found at each trophic level?

Conservation biologists studying cheetah populations have determined that the lack of genetic diversity among the cheetahs is due to genetic drift.

Which statement explains the most likely consequence of having a low genetic diversity on the cheetah population?

CRISPR-Cas9 is a genetic modification technique that edits parts of the genome of an organism. Using this technique scientists can add, remove, or modify sections of the DNA sequence.

How can scientists use this technique to control gene expression?

During secondary succession, which of these best describes why decomposing pioneer plants give way to larger, more complex plants species, such as hardwood trees?

The inheritance pattern for an autosomal dominant trait is shown in the pedigree. Shaded symbols represent individuals that express the dominant trait.

Based on this pedigree, what are the most likely genotypes of individuals I-1 and I-2?

When cells lose their ability to regulate the cell cycle, they can divide at an accelerated rate and form a mass of cells. This mass of cells is referred to as —

The model shows a mutation to a partial sequence of bases in a gene.

Which type of mutation does the model demonstrate?

In a study of physical endurance, researchers observed significant increases in the heart rates and breathing rates of participants immediately after they engaged in strenuous exercise.

Which statement best explains the increase in the heart rate and the breathing rate during exercise?

The diagrams show a partial food web containing the Glyptapanteles wasp and the life cycle of this wasp.

Based on the two diagrams, which list correctly identifies the relationships Glyptapanteles wasp larvae have with other organisms?

A chart of some plant systems and functions is shown.

Which system interactions are dependent on the plant’s ability to respond to the direction of light?

Exposure to the building material asbestos has been linked to certain types of cancers. Asbestos causes mutations in the p53 gene, which controls tumor suppression.

Which statement best explains why people with cancer due to asbestos exposure do not pass the mutation on to their offspring?

Which of these components are found in the cells of all living organisms?

A feedback mechanism in the human body is shown.

Based on this diagram, which two systems interact to maintain homeostasis?

Which role of protists has the most positive effect on maintaining the plant population in an ecosystem?

A table of four types of carbohydrates is shown.

Which list correctly matches the functions to the types of carbohydrates?

Gametes produced by an organism contain a combination of genes from that organism. In every gamete, this combination is —

2019 STAAR Biology

2019 STAAR Biology

A new predator of rabbits has been introduced within an ecosystem. This new predator runs faster than the native predators of rabbits.Which statement describes what will most likely occur in the rabbit population due to the introduction of the predator?

Which answer choice best describes a community?

Eight components present in nucleic acids are listed in the box.Which components bond with adenine in a section of double-stranded DNA?

What would be the most likely effect of a wildfire that burned a large area of a forest?

Which four body systems interact to allow a person to sneeze?

Students use a microscope to look for structures present in four different cells. The students placed an X for each structure that was viewed for each cell on the table shown.Which cell that was viewed is most likely a prokaryote?

A dichotomous key for identifying fish is shown.Based on this key, which two fish have eyes located on either side of their head and are not spotted?

Students are modeling mRNA during the process of protein synthesis. Which answer choice correctly describes the model of the mRNA strand being transcribed?

A team of students encounters an unknown organism in a field while conducting a biodiversity study. Some students think the organism is a plant, while others think it is a fungus. Which question should the students investigate to classify the organism correctly?

The San Marcos salamander, Eurycea nana, is a light reddish-brown translucent salamander about 2–5 cm in length. E. nana is found only in Spring Lake and a portion of the San Marcos River.Which human activity would most likely decrease the ability of the salamanders to survive?

The diagram shows data on the evolution of horses.The data in the diagram is evidence that —

A student produces a labeled drawing of a virus for a presentation. The student states that the capsid has a function similar to the nuclear membrane found in animal cells.Which of these describes the similar functions of capsids and nuclear membranes?

Enzymes are proteins that have a three-dimensional shape that is specific to a particular substrate. Environmental conditions can change the shape of the protein. What is the most likely result if the shape of the enzyme changes?

A type of cellular transport is shown.Which description best identifies this type of cellular transport?

Gibberellins are hormones produced in the root tips of plants. The plant uses these hormones to stimulate the growth of shoots. How are gibberellins able to affect other parts of the plant?

The diagram shows molecules that a mitochondrion uses and produces during a cellular process.Which other molecule is a product of this process?

A partial Texas food web is shownThe populations of which organisms will most likely increase as a result of a disease that suddenly reduced the population of Texas horned lizards?

A biomass pyramid of an ecosystem is shown.Which statement provides the best explanation for the difference in biomass of organisms found at each trophic level?

Conservation biologists studying cheetah populations have determined that the lack of genetic diversity among the cheetahs is due to genetic drift. Which statement explains the most likely consequence of having a low genetic diversity on the cheetah population?

CRISPR-Cas9 is a genetic modification technique that edits parts of the genome of an organism. Using this technique scientists can add, remove, or modify sections of the DNA sequence.How can scientists use this technique to control gene expression?

During secondary succession, which of these best describes why decomposing pioneer plants give way to larger, more complex plants species, such as hardwood trees?

The inheritance pattern for an autosomal dominant trait is shown in the pedigree. Shaded symbols represent individuals that express the dominant trait.Based on this pedigree, what are the most likely genotypes of individuals I-1 and I-2?

When cells lose their ability to regulate the cell cycle, they can divide at an accelerated rate and form a mass of cells. This mass of cells is referred to as —

The model shows a mutation to a partial sequence of bases in a gene.Which type of mutation does the model demonstrate?

In a study of physical endurance, researchers observed significant increases in the heart rates and breathing rates of participants immediately after they engaged in strenuous exercise. Which statement best explains the increase in the heart rate and the breathing rate during exercise?

The diagrams show a partial food web containing the Glyptapanteles wasp and the life cycle of this wasp.Based on the two diagrams, which list correctly identifies the relationships Glyptapanteles wasp larvae have with other organisms?

A chart of some plant systems and functions is shown.Which system interactions are dependent on the plant’s ability to respond to the direction of light?

Exposure to the building material asbestos has been linked to certain types of cancers. Asbestos causes mutations in the p53 gene, which controls tumor suppression. Which statement best explains why people with cancer due to asbestos exposure do not pass the mutation on to their offspring?

Which of these components are found in the cells of all living organisms?

A feedback mechanism in the human body is shown.Based on this diagram, which two systems interact to maintain homeostasis?

Which role of protists has the most positive effect on maintaining the plant population in an ecosystem?

A table of four types of carbohydrates is shown.Which list correctly matches the functions to the types of carbohydrates?

Gametes produced by an organism contain a combination of genes from that organism. In every gamete, this combination is —

A new predator of rabbits has been introduced within an ecosystem. This new predator runs faster than the native predators of rabbits.

Which statement describes what will most likely occur in the rabbit population due to the introduction of the predator?

Eight components present in nucleic acids are listed in the box.

Which components bond with adenine in a section of double-stranded DNA?

Students use a microscope to look for structures present in four different cells. The students placed an X for each structure that was viewed for each cell on the table shown.

Which cell that was viewed is most likely a prokaryote?

A dichotomous key for identifying fish is shown.

Based on this key, which two fish have eyes located on either side of their head and are not spotted?

A team of students encounters an unknown organism in a field while conducting a biodiversity study. Some students think the organism is a plant, while others think it is a fungus.

Which question should the students investigate to classify the organism correctly?

The San Marcos salamander, Eurycea nana, is a light reddish-brown translucent salamander about 2–5 cm in length. E. nana is found only in Spring Lake and a portion of the San Marcos River.

Which human activity would most likely decrease the ability of the salamanders to survive?

The diagram shows data on the evolution of horses.

The data in the diagram is evidence that —

A student produces a labeled drawing of a virus for a presentation. The student states that the capsid has a function similar to the nuclear membrane found in animal cells.

Which of these describes the similar functions of capsids and nuclear membranes?

Enzymes are proteins that have a three-dimensional shape that is specific to a particular substrate. Environmental conditions can change the shape of the protein.

What is the most likely result if the shape of the enzyme changes?

A type of cellular transport is shown.

Which description best identifies this type of cellular transport?

Gibberellins are hormones produced in the root tips of plants. The plant uses these hormones to stimulate the growth of shoots.

How are gibberellins able to affect other parts of the plant?

The diagram shows molecules that a mitochondrion uses and produces during a cellular process.

Which other molecule is a product of this process?

A partial Texas food web is shown

The populations of which organisms will most likely increase as a result of a disease that suddenly reduced the population of Texas horned lizards?

A biomass pyramid of an ecosystem is shown.

Which statement provides the best explanation for the difference in biomass of organisms found at each trophic level?

Conservation biologists studying cheetah populations have determined that the lack of genetic diversity among the cheetahs is due to genetic drift.

Which statement explains the most likely consequence of having a low genetic diversity on the cheetah population?

CRISPR-Cas9 is a genetic modification technique that edits parts of the genome of an organism. Using this technique scientists can add, remove, or modify sections of the DNA sequence.

How can scientists use this technique to control gene expression?

The inheritance pattern for an autosomal dominant trait is shown in the pedigree. Shaded symbols represent individuals that express the dominant trait.

Based on this pedigree, what are the most likely genotypes of individuals I-1 and I-2?

The model shows a mutation to a partial sequence of bases in a gene.

Which type of mutation does the model demonstrate?

In a study of physical endurance, researchers observed significant increases in the heart rates and breathing rates of participants immediately after they engaged in strenuous exercise.

Which statement best explains the increase in the heart rate and the breathing rate during exercise?

The diagrams show a partial food web containing the Glyptapanteles wasp and the life cycle of this wasp.

Based on the two diagrams, which list correctly identifies the relationships Glyptapanteles wasp larvae have with other organisms?

A chart of some plant systems and functions is shown.

Which system interactions are dependent on the plant’s ability to respond to the direction of light?

Exposure to the building material asbestos has been linked to certain types of cancers. Asbestos causes mutations in the p53 gene, which controls tumor suppression.

Which statement best explains why people with cancer due to asbestos exposure do not pass the mutation on to their offspring?

A feedback mechanism in the human body is shown.

Based on this diagram, which two systems interact to maintain homeostasis?

A table of four types of carbohydrates is shown.

Which list correctly matches the functions to the types of carbohydrates?