Biology EOC Practice Test

The graph shows changes in a population of shrimp over time. Which conclusion is supported by this data?

• An invasive species lives in this ecosystem.

• Shrimp have a symbolic relationship with another organism.

• The food source for this population changes seasonally.

• This population of organisms lives in a stable environment.

Tags

NGSS.HS-LS2-6

NGSS.HS-LS2-2

A scientist investigates the interaction of single-cell pond organisms S and T. He places organism S in pond water in Container 1. He places organism T in pond water in Container 2. He places both organisms in pond water in Container 3. The graphs show how the populations of the organisms in the containers change over time. What can the scientist conclude from this data about the interaction of organisms S and T?

• Organisms S and T are either benefited nor harmed by living together.

• Organisms S and T both benefit from living together.

• Organism S benefits from living with organism T and organism T is harmed.

• Organism S benefits from living with organism T and organism T is unaffected.

Tags

NGSS.HS-LS2-6

A researcher conducts an experiment with fruit flies. He hypothesizes that the allele for white eyes is dominant to the allele for red eyes. He crosses a red-eyed female with a white-eyed male and repeats this pairing five times. All offspring from these pairs have red eyes.

What should the researcher do after obtaining these results?

• Change his data to match his hypothesis.

• Conclude that his data supported his hypothesis.

• Record his data and conclude that his hypothesis is not supported.

• Revise his hypothesis to match his data.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A student examines the information in the table. The student conclude that Organism W should be placed at the base of the food web, to represent the feeding relationships in the marine ecosystem. However, the student later learns that Organism W's cells do not contain chloroplasts. What conclusion would be appropriate, based on the new information?

• Another organism in the marine ecosystem is a producer.

• Organism W is a secondary consumer in the marine ecosystem.

• The role of Organism T in the marine ecosystem changes during its life.

• This marine ecosystem does not have any producers.

Tags

NGSS.HS-LS2-6

NGSS.HS-LS2-3

NGSS.HS-LS2-5

A scientist crosses a homozygous red-eyed fruit fly with a homozygous white-eyed fruit fly. He returns to the lab several days later to record the phenotypes of the offspring in the F1 generation. While collecting his data, the scientist realizes that individuals in the F1 generation have produced an F2 generation of offspring in the same test tube. Which statement explains what the scientist should do next in his experiment?

• Find similar fruit fly studies and use the data from those investigations.

• Finish collecting his data on all the offspring and record it as F1 generation.

• Record half of the individuals as the F1 generation and the other half as the F2 generation.

• Repeat the initial cross using a new pair of homozygous individuals.

Tags

NGSS.HS-LS3-1

A student is investigating the effect of temperature on the growth rate of two variations of a plant species. One variation of the plant has broad leaves and the other has narrow leaves. The student prepares to grow several plants of each variation at four different temperatures. She then creates the data table shown to record the height of each plant at the end of the experiment. How can the student BEST improve the validity of the experiment?

• Complete the experiment outside to better control the growing conditions.

• Grow only one variation of the plant species to simplify the data analysis.

• Record the heights of the plants daily throughout the length of the experiment.

• Reduce data collection by focusing on one temperature instead of several.

A judge allowed a DNA analysis to be entered as evidence in court. Which of the following statements BEST explains why the use of DNA analysis is so effective in establishing identity?

• The procedure fro DNA fingerprinting is an accurate series of simple techniques.

• The probability of two people having similar DNA fingerprints is small.

• The purpose of DNA fingerprinting is to match sections of base pairs.

• The percentage of identical DNA within a species is high.

Farmers often spray chemicals on their fields to kill weeds. These chemicals may also harm the crops. Scientists have altered the DNA of some crops so that they will not be harmed by these chemicals. However, some of the weeds can cross-breed with the crops. Which statement describes a negative consequence of altering the DNA of the crops?

• The amount of chemicals needed for the crop fields would increase.

• The amount of crops grown in a field would decrease.

• The weeds could become resistant to the chemicals.

• The weeds could become smaller than the crops.

Tags

NGSS.HS-LS2-6

NGSS.HS-LS4-2

NGSS.HS-LS4-5

Which statement describes the potassium cycle?

• Potassium is eliminated from organisms by respiration and stored in the atmosphere.

• Potassium is extracted from the atmosphere by animals and stored in the soil.

• Potassium is leached from the soil by rain water and removed through crop harvest.

• Potassium is taken out of plants by bacteria and added back through decomposition.

Tags

NGSS.MS-LS2-3

Which of the following is a gas that soil bacteria convert into a form that plants can use?

• Nitrogen

• Carbon dioxide

• Oxygen

• Water vapor