Answers NM-Biology A Summer SchoolUnit Test

Unit Test Answers

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All theories are hypotheses, but not all hypotheses are theories. Francis wants to know if a specific hypothesis he is researching is a theory. Which describes how Francis would know the hypothesis is a theory?

He could restate the hypothesis as a fact and no longer an explanation.

He could determine whether the hypothesis is based on repeated experiments.

He could perform the experiment and adjust data to match the desired results.

He could design and perform a new controlled experiment to test the hypothesis.

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The teacher prepares 2.50 liters (L) of a salt solution for a class experiment. How many quarts (qt) are in 2.50 L? (1 L =1.06 qt)

2.17 qt

2.36 qt

2.52 qt

2.65 qt

To test the effectiveness of a new nutrient supplement, one group of identical mice is given the supplement, and the other group is not given anything. Which is the most complete list of the parts of an experiment presented in this scenario?

independent variable, dependent variable

control group, experimental group, dependent variable

independent variable, control group, experimental group

control group, experimental group

Examine the following list of questions.1. Why are kids afraid of ghosts?2. Should I feed the raccoons that visit my trash can?3. How does mouse color affect mouse survival?4. Does a mother duck love her babies?Which statement correctly identifies the scientific question and describes why the question is scientific?

Question 1 refers to the supernatural.

Question 2 reflects a moral or social value.

Question 3 leads to a hypothesis that can be tested.

Question 4 reflects a question that can’t be observed.

Which tool can be used to measure the volume of a liquid to one decimal place?

a thermometer

a graduated cylinder

an Erlenmeyer flask

a test tube

Take a look at the statement below:Fish meal is better than artificial fertilizers.How could this statement be revised to make it a hypothesis?

Fish meal is safer than artificial fertilizers, but it does not make plants grow.

Fish meal is a better fertilizer than artificial fertilizer because fish meal is natural.

Plants that are fertilized with fish meal will grow taller than plants that receive artificial fertilizer.

Plants that receive artificial fertilizer will be better than plants that receive fish meal.

Lakesha was culturing bacteria. She used aseptic technique to make sure there was no contamination. When she was finished, she used water to clean the surface of her table. She then put the sample in the incubator, removed her gloves, and washed her hands with soap and water. Which error did Lakesha make in her process?

A student should not culture bacteria in the lab.

Aseptic technique is used for chemical spills.

She does not need to wash her hands after culturing bacteria.

She should be using a disinfectant on her table, not just water.

A biology class is studying the effect of temperature on the amount of growth of duckweed in an aquarium. What type of data will the class need to collect, and which tools will most likely be used?

They will gather qualitative data, using a thermometer and a hand lens.

They will gather qualitative data, using a meterstick and a flask.

They will gather quantitative data, using a thermometer and a balance.

They will gather quantitative data, using a beaker and a timer.

Which equipment is best to hold and to measure liquids?

flask and graduated cylinder

scale and ruler

caliper and thermometer

stopwatch and beaker

The independent variable is the only factor that a scientist

varies for different groups in an experiment.

measures in an experiment.

keeps constant for each group in an experiment.

records throughout an experiment.

A scientist agrees with the scientific consensus that dinosaurs had scaly skin. Then he discovers a new fossil that indicates a dinosaur had feathers. The scientist refuses to consider the new evidence because it does not agree with the accepted ideas. The scientist is

being biased by the scientific consensus.

practicing skepticism by ignoring evidence.

being open-minded by finding new fossils.

drawing conclusions supported by evidence.

Scientists once believed that Tyrannosaurus rex dragged its tail along the ground. Today, they know that T. rex did not drag its tail but held it aloft, above the ground. This change in scientific consensus happened because

scientists liked the idea that T. rex held its tail aloft better.

no one supported the idea that T. rex dragged its tail on the ground.

the idea that T. rex held its tail aloft is an emerging idea that replaced the old idea.

the idea that T. rex held its tail aloft was supported by the studies of many scientists.

A teacher gave the lab group shown below an “unsafe practice” warning.What is most likely the basis for the teacher’s warning?

None of the students are dressed in appropriate laboratory attire.

Two of the students have not tied back their long, loose hair.

The lab group has not labeled all the flasks that contain liquid.

The opening of the flask is pointed in an unsafe direction.

An ecologist is conducting a field study on primates to investigate the effects of a virus on population health. He observes that infected primates that eat more of certain plants have longer lifespans. After years of collecting data, he begins to enter his data into a database. Which statements best describe the steps he still needs to carry out in order for this study to be useful to other scientists?

He needs to make more observations, compare these observations to his hypothesis, and then publish his results. His findings could help zoologists develop vaccines for primates.

He needs to summarize his data, then analyze errors and make a conclusion based on his hypothesis. His findings could help doctors treat humans with the same disease.

He needs to compare his hypothesis to the original question, then form a conclusion and write a lab report of his results. His findings could help biologists develop new vaccines.

He needs to analyze his data, then form a conclusion related to his hypothesis and publish his findings in a journal. His findings could help biologists develop new medications.

The photograph shows a park in late autumn. Which effect of the weather would most likely be studied by biologists who work in this location?

weathering and erosion of park pathways

deterioration of the man-made structures in the park

pattern and timing of leaf loss in the shade trees

exposure of rocks and minerals found in the soil

The Florida Everglades are one of the most diverse ecosystems in the United States and are home to many species of birds, reptiles, amphibians, and fish. Recently, scientists have investigated and determined that the population of pythons, which are from Asia, has increased greatly. What question is least likely to be asked based on these results?

Are the pythons a new species?

How can the python population be controlled?

How quickly are pythons reproducing in the Everglades?

How are the pythons affecting other animal populations?

The classification system for organisms has changed from seven levels to eight. This happened because

scientific consensus changed as scientists learned more about organisms.

scientists did not test the seven-level system often enough to lead to consensus.

the eight-level system of classification is an emerging idea that needs more testing.

the seven-level system of classification was not supported by scientists.

Which topic related to air travel would a biologist most likely study?

the spread of disease among passengers

the effect of air temperature on flight duration

the ratio of overhead bin space to carry-on luggage

the change in size of passenger seats over time

What is one advantage of using a computer over a graphing calculator?

Computers are more useful for quick calculations.

Computers are easier to transport to remote locations.

Computers have lower power consumption.

Computers hold larger amounts of data.

Most scientists agree that saturated fats contribute to high levels of “bad” cholesterol in a person's blood, while monounsaturated fats and polyunsaturated fats lower this type of cholesterol in a person's blood. The table below shows data about fats in some common foods.Food (14 g)Saturated fat (g)Monounsaturated fat (g)Polyunsaturated fat (g)Canola oil1.08.93.9Margarine1.65.43.4Olive oil1.99.91.4Lard5.05.81.4Butter7.93.70.5Joyce and Linda are identical twins who are 50 years old and enjoy exercising daily. Joyce avoids eating any dairy or animal products and eats granola made with canola oil for breakfast. Linda prefers rich foods, and eats bacon, eggs, and buttered toast each morning. Which statement describes a logical inference that can be made from the provided information?

Butter has higher levels of saturated fats in it than canola oil.

Linda and Joyce both have high levels of “bad” cholesterol.

Butter contains a small amount of polyunsaturated fats.

Linda has a higher level of “bad” cholesterol than Joyce.

Alyssa observed a flock of small birds in her yard. The birds visited a pair of feeders that her parents put out for them and splashed in the birdbath. Which question is a nonscientific question that she might ask about the birds?

Which among the birds that visited the feeders is the most beautiful?

Does having a birdbath present affect the feeding habits of the birds?

At what time of day do the most birds visit the feeders?

Would the birds still visit if the seed in the feeders was changed?

Why have improvements in microscopes over time resulted in revisions in the cell theory?

They have revealed new information about cell structure and processes.

They have made microscopes easier to use.

They have allowed scientists to share pictures of the cells being studied.

They have made it possible to confirm what scientists already suspected.

Density is mass per unit of volume. Which pair of lab instruments would a student use to measure the density of seawater?

a caliper and a flask

a stopwatch and a beaker

a balance and a beaker

a meter stick and a temperature probe

After examining an experimental procedure, Amir noticed that there was an error in the experimental design. He should

be skeptical of the results.

be open-minded about the experiment.

accept the results and conclusions without question.

repeat the experiment to develop scientific consensus.

Which tool was most likely used in a procedure if the lab report shows that approximately 300 mL of water was used?

a volumetric flask

a graduated cylinder

a pipette

a beaker

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