AnswersFL-2000310-Biology 1 Sem 1 - FlexAssessing Claims and Evidence

Characteristics of Life Answers

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1
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Density is mass per unit of volume. Which pair of lab instruments would a student use to measure the density of seawater?

A
a caliper and a flask
B
a stopwatch and a beaker
C
a balance and a beaker
D
a meter stick and a temperature probe
2
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The graph shows a student’s data from an investigation about plant growth in five plants of the same type.WeekAvg. Plant Height (cm)Avg. Growth (cm)02NA1312633934145Which is the best way to display this data for analysis?

A
Place the data in a chart that includes individual measurements before averages were calculated so the information is more complete.
B
Transfer the data into a pie chart with five sections, one for each week, that are sized based on plant growth for that week.
C
Use the first column of data for the x axis the second column for the y axis and plot the data in a line graph to show the growth trend.
D
Use the first column of data for the y axis the second column for the x axis and plot the data in a line graph to show the growth trend.
3

Which equipment is best to hold and to measure liquids?

A
flask and graduated cylinder
B
scale and ruler
C
caliper and thermometer
D
stopwatch and beaker
4

Jake and Aisha conducted an experiment together to test the effects of fertilizer runoff on the amount of dissolved oxygen in a lake. They each created a graph from the results. Graph 1: Jake’s Graph Graph 2: Aisha’s GraphJake concluded that the runoff had little effect on the dissolved oxygen levels, and Aisha concluded that the runoff had a major effect on dissolved oxygen levels. What is the most likely reason that Jake and Aisha formed different conclusions?

Question illustration
A
Each person used different references for comparison.
B
Jake recorded the wrong measurements on two days.
C
Aisha converted the units before creating her graph.
D
The students used different ranges for their y axes.
5

Living plants may be valuable additions to science classrooms. Which is the most important safety consideration when planning to grow plants in a classroom?

A
the light required for the plants to grow best
B
the nutrients to feed the plants
C
the composition of the soil in which to grow the plants
D
the structure and chemical properties of the plants
6

A recent encyclopedia entry about dogs cites multiple research papers done by scientists at veterinary schools. According to the article, Labrador retrievers come in two specific breeds: English and American. The English breed is described as stocky and heavy, while the American breed is described as tall and lanky. The article describes current scientific research as showing that males of both breeds usually weigh about 29-41 kg (65-90 lb), and females weigh 25-32 kg (55-70 lb). Coat colors for both breeds come in solid black, yellow, or chocolate. All labs have strong tails and webbed feet, which help them swim. Devon would like to use this information to determine if his new dog is an English or American Labrador retriever. Which best describes the reliability of the information?

A
It is not reliable because only scientists can use scientific information for reference.
B
It is not reliable because it doesn’t talk about how to test and only gives data about the breeds.
C
It is reliable because the article is based on multiple studies done by scientists at multiple veterinary schools.
D
It is reliable because it gives information about both types of Labradors in addition to information about other types of dogs.
7

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

Question illustration
A
None of the students are dressed in appropriate laboratory attire.
B
Two of the students have not tied back their long, loose hair.
C
The lab group has not labeled all the flasks that contain liquid.
D
The opening of the flask is pointed in an unsafe direction.
8

In double-blind studies neither the test subject or the researcher knows who was given the drug and who was given the control. Why are these studies effective for testing a drug that may elevate mood and relieve feelings of depression?

A
Since there are two symptoms that are affected, a double-blind study is required.
B
Double-blind studies are ways to ensure that only the researcher can figure out who is getting the effective drug.
C
Double-blind studies are the most economical way to gather results from testing on humans.
D
The patients and researchers are not given this information so they cannot be influenced in reporting the effectiveness.
9

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
A student should not culture bacteria in the lab.
B
Aseptic technique is used for chemical spills.
C
She does not need to wash her hands after culturing bacteria.
D
She should be using a disinfectant on her table, not just water.
10

Hybrid seeds are deliberately crossbred for particular traits, such as growth pattern or disease resistance. They have been hand-pollinated and are patented, often sterile, and genetically identical within food types. These plants are usually grown in a monocultural environment and are cultivated for mass production and sale. They must be sturdy to withstand mechanical picking and cross-country shipping. They do not compare to the quality and taste of heirloom plants, but they do produce large, healthy fruit that appeals to most shoppers. Unlike heirloom seeds, if one saves a hybrid seed, one will not get the same plant again. Which statement can be removed and not affect the excerpt’s reliability?

A
Hybrid seeds are deliberately crossbred for particular traits, such as growth pattern or disease resistance.
B
They do not compare to the quality and taste of heirloom plants, but they do produce large, healthy fruit that appeals to most shoppers.
C
Unlike heirloom seeds, if one saves a hybrid seed, one will not get the same plant again.
D
They have been hand-pollinated and are patented, often sterile, and genetically identical within food types.
11

The scatterplots indicate the population of rabbits in the population over time. The y-axis represents the number of rabbits and the x-axis is time. Which graph most likely represents a rabbit population that found a new, larger habitat, but then eventually experienced an increase in predation?

Question illustration
A
Graph A
B
Graph B
C
Graph C
D
Graph D
12

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?

A
Butter has higher levels of saturated fats in it than canola oil.
B
Linda and Joyce both have high levels of “bad” cholesterol.
C
Butter contains a small amount of polyunsaturated fats.
D
Linda has a higher level of “bad” cholesterol than Joyce.
13

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?

A
They will gather qualitative data, using a thermometer and a hand lens.
B
They will gather qualitative data, using a meterstick and a flask.
C
They will gather quantitative data, using a thermometer and a balance.
D
They will gather quantitative data, using a beaker and a timer.
14

In late spring, a student began conducting an investigation about the flower preferences of bees. She counted the number of wildflowers in a small plot and created the following table.Plant SpeciesNumber of PlantsDandelion13Indian paintbrush8Queen Anne’s lace20Thistle29She planned to observe the flowers for the next five days for an hour at the same time each afternoon. Then she would plot the data in a multiple line graph to compare the number of bees that visited each flower. Which statement best describes the data in this investigation?

A
The data would be more accurate if she carried out all the observations in one day so weather conditions would be constant.
B
The data would be more valid if she made the observations daily for two months.
C
The data she collected is inaccurate because the investigation is not repeatable.
D
The data she collected cannot be plotted in a line graph because it is qualitative.
15

Anjuli performed an experiment to determine the respiration rate of yeast. She determined this by measuring the amount of carbon dioxide (CO2) that was produced. Then, she created the following graph.Her teacher suggested that she redraw her graph as a line graph. Why should she redraw the graph?

Question illustration
A
A line graph looks better in a scientific report.
B
She was measuring a rate of change.
C
She had graphed the wrong relationship.
D
Her experiment had many different variables.
16

Some studies have shown that peppermint odor increases people’s mental sharpness, especially when they solve math problems. Which best describes how this could be a valid scientific claim?

A
if it is tested in a controlled setting with repeated results
B
if the test is published on Wikipedia
C
if the scientist was previously peer reviewed
D
if the math problems are easy problems
17

Gerald performed an experiment to determine if photosynthesis was affected by the color of light that a plant received. The data from his experiment are shown in the table below.Color of LightNumber of plantsAverage volume of oxygen produced (mL)green40.50orange42.0blue45.0Which format should he use to present his data?

A
bar graph
B
chart
C
line graph
D
pie graph
18

How does a good experimental conclusion differ from an inference?

A
A conclusion relates the evidence to the hypothesis and inference is a guess.
B
A conclusion explains data and an inference predicts what will occur next.
C
A conclusion provides less information to the reader than an inference.
D
A conclusion is proven to be correct; an inference is disproved by evidence.
19

What is the most important reason to control the conditions of an experiment?

A
to make the experiment easier to repeat
B
to reduce the amount of data that must be recorded
C
because this is necessary for graphing the data
D
because this is necessary for the data to be valid
20

What is the best definition of a conclusion?

A
a written description of events that occurred during an experiment
B
an act of recognizing and noting an occurrence by using the senses
C
a possible explanation of a scientific question based on observation
D
an explanation that uses data to support or reject a hypothesis

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