Unit 1 Practice Test

Pregunta 1 de 42

1

A company that manufactures a popular multivitamin wanted to determine whether their multivitamin had any side effects. For the initial study, the company chose 2000 individuals to take their multivitamin tablets per day for one year. Scientists from the company surveyed the participants to determine whether they had experienced any side effects. The greatest problem with this procedure is that

Selecciona una de las siguientes respuestas posibles:

No control group was used
Only one brand of vitamin was tested
The sample size was not large enough
The study lasted only one year

Explicación

Pregunta 2 de 42

1

In an experiment, the variable that is deliberately changed is the

Selecciona una de las siguientes respuestas posibles:

controlled variable
dependent variable
independent variable
inferred variable

Explicación

Pregunta 3 de 42

1

Radon is a radioactive gas that seeps into homes from the soil. It is thought to be a cause of lung cancer. A research team investigates this theory. They gather large amounts of data on basement radon concentrations and lung cancer rates. They concluded that the more radon there is in a home, the more likely that people living in those homes will develop lung cancer. After the study was published, other researchers criticized it by asserting that the studied neighborhoods with higher radon concentrations also have a higher percentage of older people and a higher percentage of cigarette smokers than the low-radon neighborhoods. Both advanced age and cigarette smoking increase the risk of lung cancer. This criticism, if correct, shows that the radon study suffered from __________.

Selecciona una de las siguientes respuestas posibles:

Nonsystematic observation and analysis of data
A small sample size
A lack of replication
Uncontrolled variables
An unfalsifiable hypothesis

Explicación

Pregunta 4 de 42

1

Two garden plots were planted with corn. The soil was similar in each, and equal amounts of water were applied to each plot. One plot was fertilized, and the other was not. The experimenters measured the yield of bushels of corn from each plot. The plot that did not receive the fertilizer was the ________.

Selecciona una de las siguientes respuestas posibles:

Controlled variable
Experimental plot
Replicate plot
Control plot
Dependent variable

Explicación

Pregunta 5 de 42

1

The best method for determining whether bean plants require sodium is to ________.

Selecciona una de las siguientes respuestas posibles:

grow bean plants with and without sodium
look for sodium in leaf tissues using autoradiography
analyze root content for sodium
measure how fast radioactive sodium enters the plant
measure the amount of sodium in a few bean plants

Explicación

Pregunta 6 de 42

1

A company was testing a new drug it thought would help decrease the risk of transmission of viruses from mother to fetus. In an experiment to test the compound, an investigator gave 400 pregnant female rats a small dose of experimental drug and inoculated each with a type of virus known to cause disease in rats. At the same time, 400 other pregnant rats were given only the virus. Of the rat pups born to females that received both the virus and the drug, 203 showed no symptoms of the disease; 205 rat pups born to the virus-only females showed symptoms. From this data, we can best conclude

Selecciona una de las siguientes respuestas posibles:

That the drug is 5%effective and testing on humans should begin.
That the drug seems to have little effect on viral transmission at the dosage given
Nothing, because no independent variable could be identified
That the drug enhances disease progression
Nothing, because no control group was used in the test of the drug

Explicación

Pregunta 7 de 42

1

In experimental procedures, repetition of the procedures ___________.

Selecciona una de las siguientes respuestas posibles:

is necessary before concluding that a given set of results is correct
is not necessary if the scientist obtains enough background information
is too difficult for researchers doing fieldwork
should always be done by changing a variable
wastes money that could be better spent doing new experiments

Explicación

Pregunta 8 de 42

1

Should an experiment test only one variable at a time? Why or why not?

Selecciona una de las siguientes respuestas posibles:

As long the experiment is repeated a sufficient number of times, it doesn't matter how many variables are used.
Yes, an experiment should only test one variable at a time. This ensures that the experimental outcome is clearly due to one identifiable factor.
Yes, and experiment should only test one variable at a time. That way, the experiment will only have to be performed once.
No, it is not necessary to test only one variable per experiment, especially when time is of the essence.

Explicación

Pregunta 9 de 42

1

An experiment was designed to test whether students could squeeze a clothespin more times in one minute after resting or after exercise. The dependent variable for this experiment is

Selecciona una de las siguientes respuestas posibles:

time the student was squeezing the clothespin
number of times the student was able to squeeze the clothes bin
strength of the student
length of the clothespin

Explicación

Pregunta 10 de 42

1

An experiment was designed to test whether students could squeeze a clothespin more times in one minute after resting or after exercise. The experimental result can be made more valid by

Selecciona una de las siguientes respuestas posibles:

increasing the time
using a plastic clothespin
using safety precautions
setting a specific type of exercise

Explicación

Pregunta 11 de 42

1

Which statement best describes a hypothesis?

Selecciona una de las siguientes respuestas posibles:

A process of making careful observations
The conclusion drawn from the results of an experiment is part of a hypothesis
A hypothesis serves as a basis for determining what data to collect when designing an experiment
The data collected from an experiment written in the form of a hypothesis

Explicación

Pregunta 12 de 42

1

Rellena el espacio en blanco para completar el texto.

A is a protein coat that surrounds a virus.

Explicación

Pregunta 13 de 42

1

Rellena el espacio en blanco para completar el texto.

A virus must infect a cell before it can replicate.

Explicación

Pregunta 14 de 42

1

Rellena el espacio en blanco para completar el texto.

In the cycle the virus integrates its genetic information with that of the host and then becomes dormant, letting the host multiply and continue its normal activities.

Explicación

Pregunta 15 de 42

1

Rellena el espacio en blanco para completar el texto.

In the cycle a virus infects a host cell, uses its metabolism to multiply, and then destroys the cell completely.

Explicación

Pregunta 16 de 42

1

Haz click en el botón naranja y escribe tu respuesta.

Label the X-axis.

Explicación

Pregunta 17 de 42

1

All of the following are characteristics of living things except the ability to

Selecciona una de las siguientes respuestas posibles:

grow and develop
reproduce asexually only
maintain a stable internal environment
change over time

Explicación

Pregunta 18 de 42

1

Which of the following is a fundamental unit of structure and function in living organisms?

Selecciona una de las siguientes respuestas posibles:

Organelle
Organism
Tissue
Cell

Explicación

Pregunta 19 de 42

1

The ability to keep blood sugar levels within a fairly narrow range, despite the intake of meals high in carbohydrates, is an example of

Selecciona una de las siguientes respuestas posibles:

metabolism
asexual reproduction
an adaptation
homeostasis

Explicación

Pregunta 20 de 42

1

A ❌ is a group of RNA viruses that use ❌ to replicate. ❌ cannot be used to treat viral infections, but ❌ can be used to prevent them.

Arrastra y suelta para completar el texto.

retrovirus

Antibiotics

vaccinations

reverse transcriptase

Explicación

Pregunta 21 de 42

1

❌ is the process of maintaining a stable internal environment. ❌ are used to regulate our internal environment around a ❌.

Arrastra y suelta para completar el texto.

Homeostasis

set point

Feedback Mechanisms

Explicación

Pregunta 22 de 42

1

A dog rings a set of bells hanging on the door handle. The dog's owner gets up to let them outside. What is the Stimulus in this situation?

Selecciona una de las siguientes respuestas posibles:

Owner gets up
The bell
The dog
Dog rings the bells

Explicación

Pregunta 23 de 42

1

Complete the diagram below.

Arrastra la opción correcta a cada uno de los puntos naranjas

Dilation of skin blood vessels & Sweat

Body temperature decreases

Set Point: 37.1*C

Body temperature increases

Blood vessels constrict & muscles shiver

Negative

Explicación

Pregunta 24 de 42

1

Rellena los espacios en blanco para completar el texto.

Find the mean, median, mode, and range for the following set of data:
33, 23, 44, 23, 67, 55

Mean:
Median:
Mode:
Range:

Explicación

Pregunta 25 de 42

1

Selecciona la opción correcta de los menús desplegables para completar el texto.

There are two types of data that can be collected when conducting an exerpiment. ( Qualitative, Quantitative ) which are obervations made using your senses and ( Quantitative, Qualitative ) in which instruments are used to collect numerical data.

Explicación

Pregunta 26 de 42

1

This is supported by a large body of evidence; explains how and why nature works.

Selecciona una de las siguientes respuestas posibles:

hypothesis
theory
law

Explicación

Pregunta 27 de 42

1

Describes how nature works through the use of mathematical equations. Does not focus on the how or the why.

Selecciona una de las siguientes respuestas posibles:

hypothesis
theory
law

Explicación

Pregunta 28 de 42

1

In a scientific experiment, the factors that stay the same through out the experiment are called...

Selecciona una de las siguientes respuestas posibles:

constants
controls
variables

Explicación

Pregunta 29 de 42

1

The dependent variable is the variable that is being measured in an experiment.

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 30 de 42

1

In an experiment these are used to compare results to because we know they will not respond to the independent variable.

Selecciona una de las siguientes respuestas posibles:

constants
controls
variables

Explicación

Pregunta 31 de 42

1

You know caffiene can have an impact on a person's heart rate. If you were to conduct an experiment to determine the effect caffiene has on a person's heart rate which item below would you use as your control?

Selecciona una de las siguientes respuestas posibles:

soda
energy drink
coffee
lemonaid

Explicación

Pregunta 32 de 42

1

What type of virus infects bacteria cells?

Selecciona una de las siguientes respuestas posibles:

rhinovirus
bacteriophage
retrovirus
adenovirus

Explicación

Pregunta 33 de 42

1

Which type of genetic material is most commonly found in viruses?

Selecciona una de las siguientes respuestas posibles:

DNA
RNA

Explicación

Pregunta 34 de 42

1

During the lysogenic cycle, what happens to the viral genetic material?

Selecciona una de las siguientes respuestas posibles:

it is absorbed and digested by lysosomes in the host cell
it is incorporated into the host cell's DNA
It is used to create thousands of new viruses
it is copied by the host cell and stored for later use

Explicación

Pregunta 35 de 42

1

Viruses are specific to the types of cells they infect.

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 36 de 42

1

Which of the following it the correct order for increasing complexity?

Selecciona una de las siguientes respuestas posibles:

cells--> tissues--> organs--> organ systems
tissues--> cells--> organ systems--> organs
organs--> organ systems--> tissues--> cells

Explicación

Pregunta 37 de 42

1

The process of natural changes that take place during an organism's life is called ____.

Selecciona una de las siguientes respuestas posibles:

response
adaptation
growth
development

Explicación

Pregunta 38 de 42

1

Rellena los espacios en blanco para completar el texto.

Organisms that consist of one cell are said to be , while organisms composed of many cells are said to be .

Explicación

Pregunta 39 de 42

1

Rellena los espacios en blanco para completar el texto.

reproduction consists one parent cell, while reproduction requires two parent cells. Sexual reproduction happens at a rate than asexual reproduction.

Explicación

Pregunta 40 de 42

1

Which one of these is NOT one of the characteristics of living things?

Selecciona una de las siguientes respuestas posibles:

all living things drink water
all living things are composed of one or more cells
all living things grow, develop, and have life spans
all living things reproduce

Explicación

Pregunta 41 de 42

1

Living things require energy to survive. Which of the following is NOT an example of an organism requiring energy?

Selecciona una de las siguientes respuestas posibles:

heterotrophs consume food
organisms contain DNA
decomposers break down dead material
autotrophs use sunlight to produce their own food

Explicación

Pregunta 42 de 42

1

In order to maintain homeostasis, it is most important for an animal to be able to

Selecciona una de las siguientes respuestas posibles:

change it habitat
hide from its predators
increase its prey population
respond to its environment

	Creado por Jessica Dewald hace alrededor de 6 años

9th grade Biology Test sobre Unit 1 Practice Test, creado por Jessica Dewald el 05/07/2018.

Unit 1 Practice Test

Pregunta 1 de 42

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 2 de 42

In an experiment, the variable that is deliberately changed is the

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 3 de 42

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 4 de 42

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 5 de 42

The best method for determining whether bean plants require sodium is to ________.

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 6 de 42

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 7 de 42

In experimental procedures, repetition of the procedures ___________.

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 8 de 42

Should an experiment test only one variable at a time? Why or why not?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 9 de 42

An experiment was designed to test whether students could squeeze a clothespin more times in one minute after resting or after exercise. The dependent variable for this experiment is

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 10 de 42

An experiment was designed to test whether students could squeeze a clothespin more times in one minute after resting or after exercise. The experimental result can be made more valid by

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 11 de 42

Which statement best describes a hypothesis?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 12 de 42

Rellena el espacio en blanco para completar el texto.

A is a protein coat that surrounds a virus.

Explicación

Pregunta 13 de 42

Rellena el espacio en blanco para completar el texto.

A virus must infect a cell before it can replicate.

Explicación

Pregunta 14 de 42

Rellena el espacio en blanco para completar el texto.

In the cycle the virus integrates its genetic information with that of the host and then becomes dormant, letting the host multiply and continue its normal activities.

Explicación

Pregunta 15 de 42

Rellena el espacio en blanco para completar el texto.

In the cycle a virus infects a host cell, uses its metabolism to multiply, and then destroys the cell completely.

Explicación

Pregunta 16 de 42

Haz click en el botón naranja y escribe tu respuesta.

Label the X-axis.

Explicación

Pregunta 17 de 42

All of the following are characteristics of living things except the ability to

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 18 de 42

Which of the following is a fundamental unit of structure and function in living organisms?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 19 de 42

The ability to keep blood sugar levels within a fairly narrow range, despite the intake of meals high in carbohydrates, is an example of

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 20 de 42

A ❌ is a group of RNA viruses that use ❌ to replicate. ❌ cannot be used to treat viral infections, but ❌ can be used to prevent them.

Arrastra y suelta para completar el texto.

Explicación

Pregunta 21 de 42

❌ is the process of maintaining a stable internal environment. ❌ are used to regulate our internal environment around a ❌.

Find the mean, median, mode, and range for the following set of data:
33, 23, 44, 23, 67, 55

Mean:
Median:
Mode:
Range:

There are two types of data that can be collected when conducting an exerpiment. ( Qualitative, Quantitative ) which are obervations made using your senses and ( Quantitative, Qualitative ) in which instruments are used to collect numerical data.