Kelp forests are critical ecosystems that provide habitats to a variety of animals, including sea urchins, sea anemones, crabs, jellyfish, snails, and fish. They also provide hunting grounds for mammals, including sea otters, sea lions, seals, and many different birds. In recent years scientists have documented an increase in shark attacks on sea otters in and around kelp forests. Which consequence is most likely to occur in kelp forests as a result of increased predation of sea otters?

Kelp forests will become less stable due to the increase in the size of the otters' prey populations.

Kelp forests will become more stable due to the decrease in otter predation pressure.

Kelp forests will become more stable as sharks replace otters as the top predator in the food chain.

Kelp forests will become less stable as sharks will also eliminate the prey of the otters.

Which statements best describe the difference between active transport and passive transport?

Active transport requires ATP. Passive transport does not require ATP.

Active transport occurs only in cells that require large amounts of energy. Passive transport occurs in all cells.

Active transport moves substances along the concentration gradient. Passive transport moves substances against the concentration gradient.

Active transport occurs in all cells. Passive transport requires ATP.

The Venn diagram compares two kingdoms. Which labels could be used to fill in the blanks?

1: Multicellular 2: Unicellular

1: Unicellular 2: Multicellular

Trichonympha are mutualistic microorganisms found in the gut of termites. Which statement BEST explains the relationship between Trichonympha and termites?

Trichonympha improve the survival of termites.

Trichonympha will eventually kill their host termites.

Trichonympha cause infections in termites.

Trichonympha steal resources from termites to live.

Which plant response would best aid a plant in maximizing and retaining water acquired during a drought?

Decreasing stem and leaf growth, while increasing root growth

Decreasing root growth, while increasing stem and leaf growth

Increasing root, stem, and leaf growth

Increasing leaf and root growth, while decreasing stem growth

The salamanders of the genus Ambystoma in northeastern North America are an entirely female population that produces asexually through the process of cloning. However, they have developed a way of inserting DNA from other species of salamanders into their own DNA. How has DNA from other salamander species helped these Ambystoma salamanders survive environmental changes over the past 6 million years?

By increasing genetic diversity in the population

By decreasing the mutations that occur in the DNA

By making the DNA more similar across the population

By creating many genetically identical individuals

The feedback loop for blood calcium homeostasis is shown. According to the diagram, which four body systems are interacting to maintain blood calcium homeostasis?

Endocrine, digestive, excretory, skeletal

Respiratory, digestive, muscular, skeletal

Respiratory, immune, reproductive, endocrine

Endocrine, excretory, integumentary, muscular

A diagram of removing glucose from the blood by a fat cell is shown. Which statement best describes the role of insulin and glucose transport proteins in this process?

They help to maintain stable glucose levels both inside and outside the cell.

They stimulate a response from white blood cells during glucose entry into the cell.

They keep the plasma membrane flexible when glucose is removed from the blood.

They utilize the excess energy the cell produces to create more glucose.

A Texas horned lizard ( Phrynosoma cornutum ) and a Texas bluebonnet ( Lupinus texensis ) are shown. These two DNA sequences best provide evidence that --

the nucleotides making up the genetic code are common to all organisms

all organisms have an identical genetic sequence

the Texas horned lizard eats the Texas bluebonnet

mutations occur randomly in the genetic code

In the late 1700s Edward Jenner developed the first vaccine from cowpox, an infectious virus found in cows. How do viruses, like the one responsible for cowpox, cause disease?

By replicating inside the cell and then lysing the cell

By sexually reproducing with other viruses in the environment

By gaining energy from metabolizing their food

By competing for water with cells of an infected organism

When sawdust is added to soil, organisms in the soil will use all the available nitrogen to break the sawdust down. What effect will the lack of nitrogen have on the plants that are near the sawdust?

The plants will not be able to grow.

The plants will grow faster than before.

The plants will be replaced with new plants.

The plants will evolve to no longer need nitrogen.

The function of an enzyme in a biochemical reaction is to --

speed up the rate of the reaction

raise the temperature of the system

increase the amount of substrate added

change the type of product formed

A diagram of the steps in the production of a protein is shown. Which description identifies the purpose of Step A in this process?

To copy the DNA of a gene sequence onto a strand of mRNA

To correct mutations in the DNA sequence

To produce an exact copy of the DNA molecule

To assist in the folding of a protein

Which of these properties is found only in cancer cells?

Response to signals outside of the cell

Albumin is a protein that is secreted by liver cells and transported to the bloodstream. What factor most directly determines the amino acids that are combined to create albumin?

The sequence of nucleotides in DNA

The temperature of the cell when translation is taking place

The number of chromosomes in a cell

The amount of energy that is available to the cell

There are approximately 113 species and subspecies of snakes in Texas. Why would it be important for scientists to use a standardized taxonomic system when naming each species of snake?

To avoid confusion in the identification of a variety of snake species

To ensure that all species of snakes are located in the fossil record

To place snakes in various groups based on their habitats in the ecosystem

To determine the impact of removing one species of snake from their habitat in the ecosystem

A student is looking at a classroom aquarium full of goldfish ( Carassius auratus ). The student tells a friend, "I love this community of goldfish." Why is the student incorrect to classify the goldfish as a community?

A community has two or more species.

A community must exist outside.

A community must also inclue abiotic components.

A community must have multiple generations.

During early stages of development, dolphin embryos begin to develop hind limbs. By the time the dolphin fetuses are fully developed, the hind limbs have disappeared. Which statement best explains the early development and then disappearance of hind limbs in dolphins?

The early ancestors of dolphins had hind limbs.

Dolphin fetuses change their development to adapt to an aquatic environment.

The genes that control the development of hind limbs are destroyed as the fetus develops.

Dolphins are evolving to become terrestrial animals.

The figure shows fossilized and living stalk-eyed flies from the family Diopsidae. In fossils, the eye spans of the flies are much smaller than those of living flies. Which question would BEST help determine whether the change in eye span in stalk-eyed flies was influenced by natural selection?

How does the eye span of stalk-eyed flies compare from one generation to the next?

Is the eye span male stalk-eyed flies similar to that of female flies?

What is the relationship between the body length and eye span of stalk-eyed flies?

Do fossilized stalk-eyed flies have a shorter body length than living flies?

Part A: Which statement about the transportation of these substances within the plant is true?

The carbohydrates are transported to the fungi through the phloem.

The minerals are transported from the phloem to the xylem in the shoot system.

The carbohydrates are transported from the shoot system to the fungi by the xylem.

The minerals are transported from the xylem to the phloem in the roots.

Part B: Which statement supports the answer to Part A?

The phloem transfers glucose through the plant.

The xylem is part of the plant's vascular tissues.

The xylem can move substances up from the roots.

The phloem is connected to the roots by the xylem.

The temperature at which American alligator eggs are incubated will affect the gender of the offspring. Eggs kept at 30 o C tend to hatch mostly female, while eggs kept at 33 o C tend to hatch mostly male. Which statement explains why the temperature affects the gender of alligator hatchlings?.3.b

Gene expression is different at different temperatures

Gene repair occurs differently at different temperatures.

Different parts of the embryo's DNA are deleted at different temperatures.

Different parts of the embryo's DNA are duplicated at different temperatures.

Which pair of statements best compares the primary functions of the carbohydrate chitin and the protein chitinase?

The chitin in the exoskeleton provides support and protection for insects. The chitinase breaks down chitin for energy to be used by insectivorous bats.

The chitin in the exoskeleton provides insulation for insects. The chitinase stores genetic material for insectivorous bats.

The chitin in the exoskeleton breaks down for energy to be used by insects. The chitinase provides insulation for insectivorous bats.

The chitin in the exoskeleton stores genetic material for insects. The chitinase provides support and protection for insectivorous bats.

A student creates a dichotomous key to identify birds. Based on the key, which characteristics are shared by the red-winged blackbird and the hairy woodpecker? Select TWO correct answers.

Does not have reddish coloration

Biology STAAR 2023

Passage

•

Biology

•

9th - 12th Grade

•

Practice Problem

•

Hard

•

112.34.c.4.B, 112.34.c.5.B, 112.34.c.2.B

+34

Standards-aligned

Philip Swigon

Used 82+ times

FREE Resource

47 questions

Show all answers

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Some adaptations of two species of salamanders are in the table shown.
Which statement best compares the areas where the axolotl and tiger salamanders live based on their adaptations?

Axolotl salamanders live on land near fresh water.

Tiger salamanders live in lakes.

Axolotl salamanders live in trees. Tiger salamanders live in caves.

Axolotl salamanders live in caves.

Tiger salamanders live in trees.

Axolotl salamanders live in lakes.

Tiger salamanders live on land near fresh water.

Answer explanation

Tags

112.34.c.5.B

112.34.c.12.B

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

The diagram represents a cellular process.
Which molecule is a direct product of this cellular process?

Glucose

Phospholipid

Insulin

DNA

Answer explanation

Tags

112.34.c.4.B

112.34.c.9.B

OPEN ENDED QUESTION

15 mins • 2 pts

A food web is shown. Identify and explain ONE effect that the removal of mice would have on the food web. Review the food web carefully. Then enter your answer and your explanation in the box provided.

Evaluate responses using AI:

OFF

Answer explanation

Tags

112.34.c.5.B

112.34.c.12.C

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

The diagram shows a process that occurs during the development of an organism. Which statement explains how the different cell types in the image are formed?

Each cell type uses its own unique replication process.

Each cell type expresses different genes at different times.

Each cell type contains a different part of the original DNA.

Each cell type has different enzymes to replicate genetic material.

Answer explanation

Tags

112.34.c.1.B

112.34.c.5.B

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

The diagram shows a type of chromosomal mutation. Which type of mutation is shown?

Deletion

Insertion

Duplication

Translocation

Answer explanation

Tags

112.34.c.2.B

112.34.c.6.E

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Part A:
Which timeline describes how plant diversity on the nunataks will change over time?

Answer explanation

Tags

112.34.c.5.B

112.34.c.11.B

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Part B:
Which evidence supports the answer to Part A?

The nunataks have a steep slope, so they will undergo primary succession.

The nunataks have a steep slope, so they will undergo secondary succession.

The nunataks are bare rock, so they will undergo primary succession.

The nunataks are bare rock, so they will undergo secondary succession.

Answer explanation

Tags

112.34.c.5.B

112.34.c.11.B

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Biology STAAR 2023

47 questions

Some adaptations of two species of salamanders are in the table shown.Which statement best compares the areas where the axolotl and tiger salamanders live based on their adaptations?

The diagram represents a cellular process.Which molecule is a direct product of this cellular process?

A food web is shown. Identify and explain ONE effect that the removal of mice would have on the food web. Review the food web carefully. Then enter your answer and your explanation in the box provided.

The diagram shows a process that occurs during the development of an organism. Which statement explains how the different cell types in the image are formed?

The diagram shows a type of chromosomal mutation. Which type of mutation is shown?

Part A:Which timeline describes how plant diversity on the nunataks will change over time?

Part B:Which evidence supports the answer to Part A?

A Venn diagram comparing viruses to bacteria is shown. Which traits apply to each section of the diagram?Move the answers to the correct boxes.

Which statements best describe the difference between active transport and passive transport?

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Discover more resources for Biology

Some adaptations of two species of salamanders are in the table shown.
Which statement best compares the areas where the axolotl and tiger salamanders live based on their adaptations?

The diagram represents a cellular process.
Which molecule is a direct product of this cellular process?

Part A:
Which timeline describes how plant diversity on the nunataks will change over time?

Part B:
Which evidence supports the answer to Part A?

A Venn diagram comparing viruses to bacteria is shown. Which traits apply to each section of the diagram?
Move the answers to the correct boxes.