Gr8 Unit 9 End of Unit Assessment

Instructions

Ensure all tabs on your Chromebook are closed before beginning your assessment.
You will be given 70 minutes to complete your Unit 8 End of Unit Assessment.
Please read all questions carefully and make sure to check your work before submitting.

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Homeostasis in single-celled organisms is maintained through the proper functioning of:

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By measuring the colors of light reflected by different tree species in a forest, scientists can determine the amount of biodiversity present in different areas. Maintaining biodiversity is important because it:

Base your answers to questions 3 and 4 on the diagram of a food web below and your knowledge of biology.

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Identify an organism in this food web that carries out autotrophic nutrition:

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Explain why a decrease in the population of mice would not necessarily result in an increase in rabbits:

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Direct harvesting occurs when:

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The graph below represents the white-tailed deer population in a certain area of New York State during two different years (A and B).

One reason that the population of deer is greater during Year B than during Year A could be that, during Year B, there were fewer:

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When exposed to ultraviolet (UV) light, human skin cells produce the protein melanin. This protein helps protect skin cells from damage caused by UV light. This is an example of:

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In New York State, it is common for farmers to plant large fields of one crop, such as the cornfield shown below.

A negative outcome of this practice is that:

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Humans are able to positively or negatively affect their environment in many ways. Which statement accurately describes one of these possible effects?

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While measles was once declared eliminated in the United States, explain why the CDC continues to recommend that children receive the measles vaccine:

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The axolotl, also known as the Mexican walking fish, can regenerate parts of its body, such as a leg or a tail.
The regeneration of these parts involves the process of:

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The diagram below represents a biological process.

Which statement is true about the biological process shown?

Base your answers to questions 6 and 7 on the information and photographs below and on your knowledge of biology.

An arctic fox has a gland in its brain that secretes a hormone that regulates the production of melanin, a pigment that accounts for brown fur. In the winter, the foxes secrete more of this hormone and their cells stop making melanin, so they appear white. The pictures below illustrate two variations of fur color.

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Which two rows best support the information provided?

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Which statement is the most likely explanation for the color differences in the fur of the fox at different times of the year?

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Damage to which structure would directly interfere with the nutritional needs of a developing embryo?

Base your answers to questions 16 through 18 on the passage below and on your knowledge of biology.

Fish Farming
Approximately 44% of the world’s fish produced for human consumption comes from aquaculture, which is the farming of fish and other aquatic organisms. This practice has increased the food supply and has also allowed over-fished wild populations to increase. As a result of genetic modifications, farm-raised fish usually grow faster and are typically larger than those in the wild. 

However, there are some negative environmental effects associated with fish farming. Sea lice, a parasite of salmon, have spread quickly through some farms and have also been found in waters around the farms. Farm-raised fish sometimes escape through breaks in the sea cages. There is a concern that these escaped fish could negatively affect ocean ecosystems. 

Researchers are studying methods that can be used to reduce the possible negative effects of fish farming. Improvements in engineering could make the sea cages where the farmed fish are raised more secure. Another suggestion involves raising farmed fish that have extra chromosomes. This would prevent them from reproducing with wild fish that have the normal number of chromosomes.

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Describe one advantage of raising fish in a fish farm:

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Identify one concern that individuals might have as the number of fish farms increase. Support your answer.

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Researchers are studying environmental factors, such as temperature, that could be used to produce more and larger farm-raised fish. Explain why increasing or decreasing the temperature of the water in the fish farm could have negative effects on other organisms in the area of the farm.

Base your answers to questions 19 and 20 on the information below and on your knowledge of biology.

Four model cells were prepared by using dialysis tubing and filling each of them with the same solution. Each of the model cells originally weighed 20 grams. Next, each model cell was placed in a beaker. Each of the four beakers contained a different concentration of water. After 24 hours, the mass of each model cell was measured and recorded in the data table below.

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Explain why the model cell placed in 100% water increased in mass.

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What was the concentration of water in the four cells at the start of the experiment? Use data from the table to support your answer.

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Explain how an increased pulse rate during exercise helps to maintain homeostasis in an organism.

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Base your answer to question 22 on the diagram below and on your knowledge of biology.
The diagram represents evolutionary relationships between different species.

Which species would least likely have a protein similar to species H?

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Test anxiety and stress can trigger many responses in the human body. It can stimulate increased heart and respiratory rates and increased sweating. These physical responses to increased stress are examples of:

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Which three processes usually result in the greatest variety of possible gene combinations?

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The graph below shows the acid tolerance of nine species living in water at different pH values.

Which statement best represents the information shown in the graph?

Homeostasis in single-celled organisms is maintained through the proper functioning of:

By measuring the colors of light reflected by different tree species in a forest, scientists can determine the amount of biodiversity present in different areas. Maintaining biodiversity is important because it:

Identify an organism in this food web that carries out autotrophic nutrition:

Explain why a decrease in the population of mice would not necessarily result in an increase in rabbits:

Direct harvesting occurs when:

The graph below represents the white-tailed deer population in a certain area of New York State during two different years (A and B).One reason that the population of deer is greater during Year B than during Year A could be that, during Year B, there were fewer:

When exposed to ultraviolet (UV) light, human skin cells produce the protein melanin. This protein helps protect skin cells from damage caused by UV light. This is an example of:

In New York State, it is common for farmers to plant large fields of one crop, such as the cornfield shown below.A negative outcome of this practice is that:

Humans are able to positively or negatively affect their environment in many ways. Which statement accurately describes one of these possible effects?

While measles was once declared eliminated in the United States, explain why the CDC continues to recommend that children receive the measles vaccine:

The axolotl, also known as the Mexican walking fish, can regenerate parts of its body, such as a leg or a tail.The regeneration of these parts involves the process of:

The diagram below represents a biological process.Which statement is true about the biological process shown?

Which two rows best support the information provided?

Which statement is the most likely explanation for the color differences in the fur of the fox at different times of the year?

Damage to which structure would directly interfere with the nutritional needs of a developing embryo?

Fish Farming

Describe one advantage of raising fish in a fish farm:

Identify one concern that individuals might have as the number of fish farms increase. Support your answer.

Researchers are studying environmental factors, such as temperature, that could be used to produce more and larger farm-raised fish. Explain why increasing or decreasing the temperature of the water in the fish farm could have negative effects on other organisms in the area of the farm.

Explain why the model cell placed in 100% water increased in mass.

What was the concentration of water in the four cells at the start of the experiment? Use data from the table to support your answer.

Explain how an increased pulse rate during exercise helps to maintain homeostasis in an organism.

Base your answer to question 22 on the diagram below and on your knowledge of biology. The diagram represents evolutionary relationships between different species.Which species would least likely have a protein similar to species H?

Test anxiety and stress can trigger many responses in the human body. It can stimulate increased heart and respiratory rates and increased sweating. These physical responses to increased stress are examples of:

Which three processes usually result in the greatest variety of possible gene combinations?

The graph below shows the acid tolerance of nine species living in water at different pH values.Which statement best represents the information shown in the graph?

The graph below represents the white-tailed deer population in a certain area of New York State during two different years (A and B).

One reason that the population of deer is greater during Year B than during Year A could be that, during Year B, there were fewer:

In New York State, it is common for farmers to plant large fields of one crop, such as the cornfield shown below.

A negative outcome of this practice is that:

The axolotl, also known as the Mexican walking fish, can regenerate parts of its body, such as a leg or a tail.
The regeneration of these parts involves the process of:

The diagram below represents a biological process.

Which statement is true about the biological process shown?

Base your answer to question 22 on the diagram below and on your knowledge of biology.
The diagram represents evolutionary relationships between different species.

Which species would least likely have a protein similar to species H?

The graph below shows the acid tolerance of nine species living in water at different pH values.

Which statement best represents the information shown in the graph?